Must-Read: Simon Wren-Lewis: A Self-Fulfilling Expectations-Led Recession?

Must-Read: Simon Wren-Lewis: A Self-Fulfilling Expectations-Led Recession?: “I acknowledge that macro rightly got a lot of stick by largely ignoring the role of finance…

…but I also point out that the poor recovery has involved a vindication of the core macro model: austerity is a bad idea at the ZLB, QE was not inflationary and interest rates on government debt did not rise but fell…. I end by showing them this chart:

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There has been no recovery from the Great Recession…. A mechanical way to explain what has happened is to bend the trend: to suggest that technical progress has been slowing down for some time. This inevitably means that the pre-crisis period is transformed into a boom. I have been highly skeptical… traditional ideas about what inflation would do in a boom….

Suppose that firms and consumers came to believe that the output gap was currently zero when it is not…. Suppose also that unemployed workers priced themselves into jobs by cutting their (real) wage or disappearing by no longer looking for work…. How do we know that we are suffering from demand deficiency? The traditional answer in macroeconomics is nominal deflation: falling wages and prices. But because workers have already priced themselves into jobs, nothing more will come from the wages route. So why would firms cut prices?…

The accelerator remains a very successful empirical model of investment…. But if beliefs are such that the market is not going to expand that much, because firms believe the economy is ‘at trend’ and trend growth has now become pretty small, then the need to invest to meet an expanding market largely goes away…. It is this possibility which is the reason that I have always argued central banks and governments should have been much more ambitious about demand stimulation after the Great Recession. As I and others have pointed out, you do not have to attach a very high probability to the scenario that demand will create supply before it justifies a policy of ‘testing the water’ by letting the economy run hot. Every time I look at the data above, I ask whether we have brought this on ourselves by a combination of destructive austerity and timidity.

Should-Read: Clare McCann: The False Promises of Online Education

Should-Read: Clare McCann: The False Promises of Online Education: “Caroline Hoxby found that online education may not be the ‘low-cost, high-quality’ opportunity many say it is…

…Tuition that sometimes exceeds the on-campus price and post-college earnings that do not cover students’ upfront costs. But the report has set off something of a firestorm within the industry this week as researchers and other stakeholders (including several online learning experts) challenged the study’s methodology. That’s because the study, which used individuals’ IRS data to calculate tuition costs and return on investment, estimated a student’s likelihood of being online based on the school’s distance-education offerings. Serious data limitations mean that the author couldn’t know whether each student attends online or not.

A separate, nationally representative survey of postsecondary students shows that, among students attending an entirely online program in 2012, 36 percent were at for-profit institutions, while more than half were at public institutions…. But in the Hoxby study, which uses data from the IRS along with information about school-level offerings,  77 percent of students attending  exclusively online institutions were at for-profit schools. Given the limitations of the methodology, along with these discrepancies across data sources, the conclusions can’t necessarily be extrapolated out to include every online program, particularly for students who attend online programs through mostly brick-and-mortar institutions. Rather, the findings are largely applicable to students at for-profit online institutions…

Should-Read: Richard Lipsey: The Phillips Curve and an Assumed Unique Macroeconomic Equilibrium in Historical Contex

Should-Read: Richard Lipsey: The Phillips Curve and an Assumed Unique Macroeconomic Equilibrium in Historical Context: “So we seem to have gone full circle from the early Keynesian view…

…in which there was no unique level of GDP to which the economy was inevitably drawn, through a simple Phillips curve with its implied trade-0ff, to an expectations-augmented Phillips curve (or any of its more modern equivalents) with its associated unique level of GDP, and finally back to the early Keynesian view in which policymakers had an option as to the average pressure of aggregate demand at which economic activity could be sustained. However, the modern debated about whether to aim for [the high or low range of stable unemployment rates] is not a debate about inflation versus growth, as it was in the 1950s, but between those who would risk an occasional rise of inflation above the target band as the price of getting unemployment as low as possible and those who would risk letting unemployment fall below that indicated by the lower boundary of the NAIBU  as the price of never risking an acceleration of inflation above the target rate.

Should-Read: John Maynard Keynes (1941): Keynes on the Limits of Econometrics: To Koopmans

Should-Read: John Maynard Keynes (1941): Keynes on the Limits of Econometrics: To Koopmans: “Many thanks for sending me your article. I enjoyed it very much…

…I am sure these matters need discussing in that sort of way. There is one point, to which in practice I attach a great importance, you do not allude to. In many of these statistical researches, in order to get enough observations they have to be scattered over a lengthy period of time; and for a lengthy period of time it very seldom remains true that the environment is sufficiently stable. That is the dilemma of many of these enquiries, which they do not seem to me to face. Either they are dependent on too few observations, or they cannot rely on the stability of the environment. It is only rarely that this dilemma can be avoided.

Thinking about levels when it comes to macroeconomic policy targets

A stock trader has taped a one dollar bill to his computer screen at the New York Stock Exchange.

In a piece last week at The New York Times’s the Upshot, Neil Irwin highlighted probably the biggest question for the U.S. economy in 2017: How far is it from its potential? That question could launch a thousand blog posts, so let’s focus on one small aspect.

Irwin’s column features a graph of potential gross domestic product measured in trillions of dollars, based on the latest Congressional Budget Office projections, alongside actual GDP charted over time. Actual GDP, at about $19 trillion, seems set to reach CBO’s estimate of its potential of just over $20 trillion soon. GDP approaching its potential level may be something to enjoy, but it’s far from something policymakers should be bragging about.

Whether or not this specific estimate of potential is correct, what policymakers should focus on in that graph is not only where the two measures of GDP are about to intersect, but the gap between actual and potential GDP over time means for macroeconomic policymaking.

On one hand, policymakers could look at the graph to see that the line of actual GDP is just about to intersect with the line of potential GDP and be relatively content with the state of the wider economy. An economy almost at its potential is an economy where demand problems are about to be eliminated.

On the other hand, policymakers could instead focus on the area between actual GDP and potential GDP. The area covered in the gap between those two lines over the years since the start of the Great Recession is the total amount of GDP growth lost due to insufficient demand in the economy. The area between those lines represents trillions of dollars of economic output that could have happened if macroeconomic policy had more aggressively boosted economic growth. Those lost dollars between actual and potential economic output also represents millions of jobs and accompanying paychecks that were forgone as well.

What’s more, the gap in Irwin’s graph may be a low estimate of these lost dollars because potential GDP may be higher than CBO currently projects. If estimates of the economy’s potential are too low because more workers could be employed or productivity growth is set to increase, then the gap between potential and actual GDP would be higher both in the present and the past.

The distinction between the intersection of actual and potential GDP and the gap between the two also is helpful in thinking about the targets for macroeconomic policy. Imagine Irwin’s graph but instead of GDP, the variable being graphed is the price level in the economy. If the Federal Reserve wants to see prices go up by 2 percent a year, then the targeted price level (analogous to potential GDP) would increase by 2 percent every year. Currently, however, the Fed seeks to meet an inflation target, which means it is just trying to get actual inflation back to 2 percent. In other words, just getting back to the line is the goal.

But if the Fed had a price-level target, which may do a better job of convincing employers and employees of the changes in prices, then the goal is to have as little deviation between the two lines and to have corresponding and offsetting deviations. If we think of overshoots of inflation as having a “positive” area and undershoots as having “negative” area, then the goal of price-level targeting is minimizing the total gap between the two lines.

The same logic also could apply to a nominal gross domestic level target for monetary policy. In this case, the Fed would seek to eliminate the total deviation from a targeted path of nominal GDP growth against actual nominal GDP. On a podcast hosted by David Beckworth of the Mercatus Center, Brown University economist Gauti Eggertsson pitches this idea as “nominal GDP debt.” If policymakers think of overshoots of the targeted nominal GDP trend as “growth surpluses” and undershoots as “growth deficits,” then a nominal GDP level target set them up to make sure the U.S. economy doesn’t have “growth debt” over time.

Looking at Irwin’s original graph of actual GDP compared to potential GDP, it may seem to policymakers that the job of boosting economic growth is almost finished. But such thinking might provide little comfort given the potential left idle and the economic possibilities left unfulfilled. Whatever the case, policymakers might be more amenable to level targeting of the pairs of trend lines for inflation and for nominal GDP growth since both of these measures would enable them to get these targets back to level ground.

Should-Read: Rod Dreher: Life In ‘The City Of Rod’

Should-Read for Ash Wednesday: May I say that I find this from Rod Dreher responding to Elizabeth Stoker Bruenig simply bizarre?:

Rod Dreher: Life In ‘The City Of Rod’][]: “More [from Elizabeth Stoker Bruenig]…:

…Suffice to say, some find the moral landscape of modernity rather impoverished, and the options for pursuing it in a liberal world frustratingly limited. One can chase what one believes to be the good life, but one cannot place moral claims on others. This is the “catch,” as it were, of liberalism: “Liberalism,” political theorist Judith Shklar wrote, “has only one overriding aim: to secure the political conditions that are necessary for the exercise of personal freedom.” Or, as Catholic philosopher Jacques Maritain had it: “Obey none but yourself.”

Thus ardent Christians who believe that a life modeled after Christ’s is not best for them but simply best have little room to advance their case in public life. To do so would be to infringe upon the liberties of others, and liberalism cannot abide such a violation. (It’s no accident that the earliest liberals had a special contempt for Catholics, who are especially inclined to protest the reduction of the faith to a private sentiment.)

This is good. She understands what’s at stake here. If the absolute telos of liberalism is to free the individual to do what he or she wills, then not only is that the “irresolvable kernel of discord” between Christianity and liberalism, but it also explains (as ESB does above) why liberalism now pushes Christians who dissent from liberalism out of public life…

I disagree 1000%, at least if “advancing their case in public life” = “passing laws to make people do what you regard as shaping up”.

My great^10 (I think it’s great^10–I should sign up on http://ancestry.com to check) grandfather John Winthrop was definitely a liberal: the only other option for him was to be a Catholic or an Anglican, both of which he was sure to the core of his bones would be to lose his soul. But he was not going to be pushed out of public life, even though he was sailing 3000 miles away from the land in which he was born. What was he going to do there? He was going to build a utopia. And then that utopia would be his testimony in public life–not pushed out of it, at the core of it, and not by passing laws to mandate that others behave as his sect thought they should, but by setting a good and ultimately irresistible example:

Now the only way to avoid this shipwreck, and to provide for our posterity, is to follow the counsel of Micah, to do justly, to love mercy, to walk humbly with our God. For this end, we must be knit together, in this work, as one man. We must entertain each other in brotherly affection. We must be willing to abridge ourselves of our superfluities, for the supply of others’ necessities. We must uphold a familiar commerce together in all meekness, gentleness, patience and liberality. We must delight in each other; make others’ conditions our own; rejoice together, mourn together, labor and suffer together, always having before our eyes our commission and community in the work, as members of the same body.

So shall we keep the unity of the spirit in the bond of peace. The Lord will be our God, and delight to dwell among us, as His own people, and will command a blessing upon us in all our ways, so that we shall see much more of His wisdom, power, goodness and truth, than formerly we have been acquainted with. We shall find that the God of Israel is among us, when ten of us shall be able to resist a thousand of our enemies; when He shall make us a praise and glory that men shall say of succeeding plantations, “may the Lord make it like that of New England.”

For we must consider that we shall be as a city upon a hill. The eyes of all people are upon us. So that if we shall deal falsely with our God in this work we have undertaken, and so cause Him to withdraw His present help from us, we shall be made a story and a by-word through the world. We shall open the mouths of enemies to speak evil of the ways of God, and all professors for God’s sake. We shall shame the faces of many of God’s worthy servants, and cause their prayers to be turned into curses upon us till we be consumed out of the good land whither we are going.

And to shut this discourse with that exhortation of Moses, that faithful servant of the Lord, in his last farewell to Israel, Deut. 30. “Beloved, there is now set before us life and death, good and evil,” in that we are commanded this day to love the Lord our God, and to love one another, to walk in his ways and to keep his Commandments and his ordinance and his laws, and the articles of our Covenant with Him, that we may live and be multiplied, and that the Lord our God may bless us in the land whither we go to possess it. But if our hearts shall turn away, so that we will not obey, but shall be seduced, and worship other Gods, our pleasure and profits, and serve them; it is propounded unto us this day, we shall surely perish out of the good land whither we pass over this vast sea to possess it.

Therefore let us choose life, that we and our seed may live, by obeying His voice and cleaving to Him, for He is our life and our prosperity.

Yeshua bar Yosef had things to say about those wanted to “place moral claims on others”. Basically, he said, don’t:

Ye have heard that it hath been said, An eye for an eye, and a tooth for a tooth: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also. And if any man will sue thee at the law, and take away thy coat, let him have thy cloak also. And whosoever shall compel thee to go a mile, go with him twain. Give to him that asketh thee, and from him that would borrow of thee turn not thou away.

Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy. But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you; That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.

For if ye love them which love you, what reward have ye? do not even the publicans the same? And if ye salute your brethren only, what do ye more than others? do not even the publicans so?

Be ye therefore perfect, even as your Father which is in heaven is perfect.

(Late) Monday Smackdown: In Which I Am Annoyed at Being Paired with John Taylor

Clowns (ICP)

The IMF’s Finance and Development has paired me on “secular stagnation” with John Taylor.

When they told me that I would be paired with John Taylor, I protested: As I see it, sometime in the early 2000s John Taylor ceased being an economist and became a politician. Hence, I thought, he was likely to have very little of value to say to professional economists–to those of us who are trying to use the tools of economics to understand the world.

And I see that I was right: I do not think Taylor’s piece has any value at all to professional economists.

Let me take especial note of five passages in Taylor’s piece: passages that, in my view, a professional economist simply could not write:

The fact that central banks have chosen low policy rates since the crisis casts doubt on the notion that the equilibrium real interest rate just happened to be low. Indeed, in recent months, long-term interest rates have increased with expectations of normalization of monetary policy…

People did not just change their expectations with respect to the chances of “normalization” of interest rates. To say that they did is a politician’s and not a professional economist’s statement. Long-term interest rates increased with the shifting expectations of Trump deficits and the belief that an inflation targeting Fed to respond.

And claiming that central banks feely “chose” low policy rates… Central banks were impelled and compelled by what they saw and see as very strong evidence of a low equilibrium real interest rate. A professional economist would not say that their “choice” of such low rates casts doubt on the notion of a low equilibrium real rate. A professional economist would say that low policy rates reflect central banks’ judgment that the equilibrium real rate was low–and that the failure of inflation to accelerate with low policy rates affirms the correctness of that judgment.

As bad is:

Low policy interest rates set by monetary authorities, such as the US Federal Reserve, before the financial crisis were associated with a boom characterized by rising inflation and declining unemployment—not by the slack economic conditions and high unemployment of secular stagnation…

Again, this is not something that a professional economist would say. Core inflation was 2.8% on the eve of the 2001 recession and 2.4% on the eve of the 2008 recession. A professional economist simply cannot say that the course of inflation over that business cycle is in any way evidence that policy interest rates over the cycle were in any Wicksellian sense “too low”. A professional economist simply can not say that the course of employment over that business cycle is in any way evidence of an unsustainable boom:

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This third is, I think, worst of all:

The evidence runs contrary to the view that the equilibrium real interest rate—that is, the real rate of return required to keep the economy’s output equal to potential output—was low prior to the crisis…

If inflation stable over the cycle and subpar employment performance with very low real policy rates is not “evidence… [for] the view that the equilibrium real interest rate… was low prior to the crisis”, what could possibly be evidence for that view?

Professional economists like John Williams who estimate r* find a 1.25%-point decline in it from the late 1980s to 2007–and then another 1.25%-point decline in the crisis.

Cursor and Whatever happened to secular stagnation

But perhaps Taylor’s most political statement of all is:

During the 1980s and 1990s, tax reform, regulatory reform, monetary reform, and budget reform proved successful at boosting productivity growth in the United States…

“Tax reform”–for the Republicans who are Taylor’s main audience, “tax reform” means the 1981 Reagan tax cut. But productivity growth did not rise until after 1995. That is a very long fuse indeed to run a claim from policy cause to economic effect.

“Regulatory reform”–Anne Gorsuch’s actions as EPA head giving a pass to lead polluters in 1981-2 was particularly unfortunate given what we have learned since about lead and human cognition. Again, the timing does not work, and is hidden by Taylor’s artful reference “during the 1980s and the 1990s”. Again, productivity growth did not rise until after 1995. That is a very long fuse indeed to run a claim from policy cause to economic effect.

“Monetary reform”–that was Paul Volcker’s accession to the Fed Chairship in 1979. But, once again, productivity growth did not rise until after 1995. And, once again, is a very long fuse indeed to run a claim from policy cause to economic effect.

Tax “reform”, regulatory “reform”, and monetary “reform” were not obviously helpful “during the 1980s and 1990s”. The big pushes come at the start of the 1980s. The productivity boom comes more than a decade and a half later.

Only with “budget reform” is there a case that a professional economist might make. “Budget Reform” is, in this context, the 1993 Clinton administration Reconciliation Bill—the bill that undid a lot of what Taylor’s employers and allies had done in the previous fifteen years. There are possible and plausibly strong links for a professional economist to draw between the adoption of not-insane and sustainable U.S. fiscal policies in 1993 and the post-1995 productivity boom propelled by the leading high-tech sector. How strong are these links? That is uncertain.

But “during the 1980s and 1990s, tax reform, regulatory reform, monetary reform, and budget reform proved successful at boosting productivity growth in the United States” is not a statement a professional economist could or would make.

Last:

The recent US election has raised the chances for tax, regulatory, monetary, and perhaps even budget reform…

Are any words necessary?

Finance and Development, I think, made a bad mistake in choosing Taylor for this role. Taylor’s is a political document. It is written for political purposes. If fall the readers of Finance and Development understand that–and do not take it as an attempt to analyze the economy–no harm will be done. But not all readers will. Some will think they are supposed to learn something about the economy from it. They will be misled thereby.

Must-Read: Jared Bernstein: Inflation?! We ain’t got no stinkin’ inflation

Must-Read: This time series since 2008 is not what would be produced by a central bank with a symmetric target of 2%/year for core PCE inflation:

Core PCED Inflation Through 2016Q4

I see nothing in the data to suggest that 2% will be reached if the Federal Reserve does not reverse its tightening cycle as ill-judged.

That is all.

Jared Bernstein: Inflation?! We ain’t got no stinkin’ inflation!: “The core PCE deflator rose at an annual rate of only 1.2 percent in 2016Q4…

…GDP’s on trend at about 2 percent, the job market is closing in, but not yet at, full employment (the underemployment rate is still about a percentage point too high), and wage growth has picked up a bit but it’s not bleeding into price growth in anything like an obvious or threatening way. And inflation remains below the Fed’s 2 percent target and could even be slowing…. The evidence in favor of a Fed rate hike in March looks really very, very weak.

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Sustaining preschool gains can help the benefits of early childhood education endure

In this photo, assistant teacher D’onna Hartman smiles as she works with children at the Creative Kids Learning Center in Seattle.

Preschool’s promise to close achievement gaps and reduce educational inequalities in the United States is facing renewed challenges. New research continues to show that the cognitive benefits of early childhood education programs appear to diminish by primary school, especially in programs that target children from low-income families.

Yet there are several issues with assessing only the medium-term outcomes from attending preschool—issues that demonstrate that these fade-out arguments insufficiently account for other measurements and determinants of success. What’s more, these results instead indicate there is a mismatch in our educational system that prevents many kids from sustaining the undeniable early gains from a preschool education. To address this mismatch, researchers and policymakers are also looking to new ways to encourage continuity and consistency in early education.

In a recent essay for The Washington Post, Drew Bailey and Greg Duncan of University of California-Irvine and Candice Odgers of Duke University add to the commentary on fade-out. Using data on literacy and math achievement from close to 70 high-quality prekindergarten programs targeted toward low- and lower-middle income families, the researchers find short-term boosts from preschool participation, followed by a quick dissipation of the gains. The meta-analysis of cognitive skills by the end of the programs shows that within one year of attending an early childhood education program, the effect sizes across programs were halved, and by two years, they were halved again.

These patterns of narrowing cognitive achievement gaps between prekindergarten-goers and non-participants have been documented by others, too, but often fail to consider the non-cognitive skills built by early childhood education—skills such as grit or problem solving that in combination with cognitive skills help determine life-long success. Bailey, Duncan, and Odgers do acknowledge that the long-term benefits of early childhood education interventions—such as reduced grade retention rates, improved college enrollment, and increased adult earnings—justify investments in preschool. They note, though, that “it’s also a mistake to expect that initial gains will sustain themselves.”

Sure enough, sustaining the gains remains an important conversation among early childhood education researchers and practitioners alike. While there are many different ways to extend the cognitive (and even non-cognitive) rewards of attending high-quality preschool, there seems to be consensus that improving the transition to kindergarten and the quality of kindergarten and primary school programs is vital.

A smooth transition from a high-quality prekindergarten program to kindergarten and, later, primary school can positively impact a student’s educational outcomes. Yet the current synergy between high-quality preschool and elementary schools may not allow for consistency of experience. In response to this observation, some experts suggest focusing on aligning efforts between prekindergarten programs through third grade to create seamless transitions through instruction, curriculum, and even tests.

This movement, known as P-3, is still in its early phases, but results from programs around the country are beginning to trickle in. One such study, conducted by the RAND Corporation researchers Gail Zellman and M. Rebecca Killburn, evaluated Hawaii’s P-20 Partnerships for Education’s P-3 state program across five sites. The program itself focuses on improving the literacy outcomes for students by third grade, with the hope that program participants are all reading at grade level by then.

Zellman and Killburn find that since the program’s start in 2009, students’ reading scores increased statistically significantly while exposure to the P-3 program improved their chances of receiving a proficient on the statewide reading test by third grade. Even though Hawaii’s P-3 program showed moderate success by third grade, there is still much to learn about the long-term effects of an aligned curriculum. Time will ultimately help reveal whether P-3 is an effective way to address the fade-out of cognitive skills, but in the meantime its potential for reducing achievement gaps is encouraging.

The responsibility to help sustain the gains cannot just be placed on educational institutions. There are a variety of factors that influence children’s long-term outcomes aside from prekindergarten and primary school, including what happens at home. And considering that educational achievement gaps between young children from high- and lower-income families may be mirroring widening income-based gaps in non-school learning activities, families’ engagement with their young children is equally important to early development and learning.

Recent research by Equitable Growth grantee and University of Chicago professor Ariel Kalil, New York University’s Kathleen M. Ziol-Guest, Georgetown University’s Rebecca M. Ryan, and University of Virginia’s Anna J. Markowitz shows that while lower-income families are increasingly owning children’s books or visiting the library, the income-based differences between parental actions, such as reading to children, teaching words and numbers, and other daily cognitively-based activities, and cultural activities, such as museum or zoo visits, are growing.

The four scholars’ findings indicate that lower-income families may require more support to be able to engage with their children to complement classroom-based learning. Models such as the Nurse-Family Partnership or the parent outreach and engagement components of the Chicago Child-Parent Center can serve as templates for how to strengthen parent involvement in early childhood education. But to help ensure the benefits of prekindergarten endure, more strategies and resources for lower-income families are needed.

Academics and policymakers do not have all the answers to how to reduce preschool fade-out or sustain the gains made in early childhood education programs. But through coordinated efforts at school and at home, they may get one step closer to closing achievement gaps, reducing educational inequalities, and ultimately fulfilling preschool’s promise. After all, if successful, these investments will only bolster the academic, individual, familial, and societal outcomes that promote broad-based and more equitable economic growth.

Should-Read: Sarah Perry: The History of Fertility Transitions and the New Memeplex

Should-Read: Sarah Perry: The History of Fertility Transitions and the New Memeplex: “European cultures have historically prevented people from restricting family size within marriage…

…The European marriage pattern allowed for the control of fertility only through delaying and restricting nuptiality. A new pattern, allowing for controlled fertility within marriage, simultaneously originated in New England and France in the late eighteenth century. The new pattern traveled with a new set of values, including suffrage, democracy, equality, women’s rights, and social mobility. Its main mechanism of spread was education, the availability of which also incentivized the new fertility pattern’s adoption by providing a clear way for parents to compete for the future status of their children by having fewer children. The new pattern spread across Europe, North America, and Australia during the late nineteenth and early twentieth century, encountering temporary, partial resistance from some groups. Even Catholics and Mormons worldwide adopted controlled fertility by the early twentieth century or earlier.

As the new pattern grew to dominate the western world in the twentieth century, Asia and Latin America transitioned to the new pattern. Sub-Saharan Africa entered a fertility transition beginning in the 1980s that is ongoing. In each of these transitions, when controlled fertility was adopted, the pre-transition positive (eugenic) relationship between fertility and wealth became a negative (dysgenic) relationship. Only tiny pockets of culture that maintain extreme separation from the new pattern – especially through refusing outside education and preventing women from contact with the outside world – have fertility patterns plausibly consistent with uncontrolled fertility. These may include the Amish and Hassidim in the United States.

Once the fertility transition to controlled fertility occurs in a population, its fertility generally continues to decline until it is below replacement. The benefits of the new pattern are increased material wealth per person, a reduction in disease, starvation, and genocide, and upward social mobility. The main drawback is the onset of a dysgenic phase that may end civilization as we know it.