Alvin Hansen on Economic Progress and Declining Population Growth

In: Population and development review, Volume 30, Issue 2, p. 329-342

Abstract

The driving forces of economic growth, according to the mainstream of classical economic thinking, are threefold: technological innovations, the opening up of new territories and discovery of new resources, and increase in population. In interaction, in an entrepreneurial market economy, these forces generate growth not only in the aggregate but also per capita. Evidence of their power was seen in the long stretch of rising living standards in the West over the nineteenth century, despite the ups and downs of the business cycle. However, the economic experience of the interwar years, and in particular the Great Depression of the 1930s, suggested that the forces were largely spent and hence that future economic prospects were gravely imperiled. The Keynesian revolution in economics was a response to the evident malfunctioning of the capitalist economic system, although the policy recipes it offered (for increasing demand and investment to levels capable of generating an equilibrium consistent with full employment of productive resources, especially labor) by no means commanded unanimity.The most prominent American contributor to and spokesman for the new line of economic analysis—often called "the American Keynes"—was Alvin H. Hansen (1887–1975), who took up his professorship of political economy at Harvard in 1937, just after the appearance of Keynes's General Theory. In that post, which he held until his retirement in 1956, he was one of the most influential economists of the era as a theorist, policy adviser, and teacher. Hansen interpreted the economic problems of the 1930s not just as the manifestation of a particularly sharp cyclical downturn, but as evidence of secular stagnation caused by the closing of the economic frontier, sluggishness in technological innovation, and, not least, "a drastic decline in population growth." This "stagnation thesis" is most succinctly set out in his presidential address to the American Economic Association, delivered in Detroit, 28 December 1938, under the title Economic Progress and Declining Population Growth. The address is re‐produced below from the March 1939 issue of the American Economic Review. (The opening paragraphs of the address, and two paragraphs, immediately preceding the closing paragraph, in which Hansen discusses changes in US national income in the 1930s, have been omitted.)Hansen's analysis of the effects of declining population growth in many ways echoes the thesis set out by Keynes in his seminal Galton Lecture delivered to the Eugenics Society in 1937 (reprinted in the Archives section of PDR 4, no. 3): a demographic slowdown decreases opportunities for profitable investments and increases levels of attempted saving, hence pushes the economy toward a low‐growth equilibrium at which resources are underutilized and unemployment is high. Hansen puts special emphasis on demographically induced shifts in the composition of output. He suggests that, beyond its direct positive effect on investment and output, population growth also has an indirect enhancing effect on these factors by facilitating technological progress–contrary to the "older Malthusian view." In his policy proposals Hansen was more interventionist than Keynes, advocating a more intrusive government role in the economy as a possible means of escaping the vicious cycle of low demand and high unemployment. As to government action to reverse demographic trends seen as deleterious, neither Keynes nor Hansen argued for policies to increase fertility, presumably because they saw them as both inappropriate and, in comparison to remedial economic policy measures, inefficient or unfeasible.The demands of the war economy in the years following Hansen's address took care of the employment problem, and the immediate postwar decades brought the stimuli of pent‐up consumer demand, an outpouring of technological innovations, a reopening of the economic frontier produced by a more liberal trade regime, and, also, an acceleration of population growth. The result was rapid overall economic growth and increasing levels of per capita income. Keynesian demand management played some role in this economic success story: by the end of the 1960s even US President Richard Nixon pronounced himself a Keynesian. But it offered no remedy for the stagflation that eventually followed. The growth‐promoting recipes favored in the last decades of the century (especially in the most successful developing economies) were anything but Keynesian: limited government, fiscal restraint, and globalization.Yet recent and anticipated demographic trends, especially in Europe—notably fertility decline and population aging—make Hansen, once again, interesting reading. Commitments of the modern welfare state for health care, retirement pensions, and job security command wide approval, but they have boosted governments' weight in the economy and made labor markets inflexible, unemployment high, and retirement early—developments that may increasingly impose a brake on economic growth and on improvements of living standards. Reform measures to ease these burdens are, in principle, straightforward, but their immediate social costs are heavy and their rewards are delayed, hence resistance to reform is strong and growing. This is likely to stimulate the search for alternative policies that offer politically more palatable tradeoffs—some of which may turn out to have an unmistakably Hansenian flavor. As to future population trends, Hansen, despite his reference to a "drastic decline in population growth" based on a comparison of nineteenth‐ and twentieth‐century Western demographic change, envisaged a convergence to a stationary population or a tendency toward very slow decrease. Yet some economies are already locked into a demographic pattern that augurs sharper declines and more rapid population aging, enhancing the relevance of the issues posed by Hansen. In Germany, for example, in the absence of immigration, the population between ages 20 and 40 will decline from 21.6 million in 2005 to 16.3 million in 2025—a drop of 23 percent. Over the same time period, the population aged 60 and older will grow from 20.5 million to 25.8 million—an increase of 26 percent. Serious efforts to slow population decline and retard population aging by stimulating fertility would of course add another major burden to government budgets.