Research Papers

“The Failure of Democracy” – “The weaknesses of Weimar” Do headlines such as these suggest that the whole architecture of the first German republic was wrong, that it was doomed right from the start, that the “collapse” was unavoidable?

In the paper that we present this afternoon, Soren Johansen, Anders Rahbek, Morten Tabor, and I introduce the Qualitative Expectations Hypothesis (QEH) as a new approach to modeling macroeconomic and financial outcomes.

After re-iterating five well-known theorems about the properties of conditional expectations in stationary settings—such as providing unbiased minimum mean square error predictions despite in- complete information, and the law of iterated expectations—we clarify unpredictability and illustrate its prevalence empirically.

I have read the various conference papers and am struck by the fact that many use the (omnipresent New-Keynesian) model of an aggregate loanable funds market to diagnose secular stagnation and investigate possible remedies.

The prevailing wisdom that aggregate demand ‘shocks’ determine short-run cyclical fluctuations around a supply-determined equilibrium growth rate and an associated equilibrium unemployment rate (or NAIRU) has been called into question by various streams of literature in the last decades. Specifically, a recently revived literature on hysteresis finds significant persistence in the effects of recessions and negative aggregate demand shocks (Blanchard et al. 2015; Martin et al. 2015).

The past 30 years has witnessed a worldwide decrease in real interest rates. We demonstrate that a large part of the fall in interest rates can be explained by changes in demography, which are as the result of a sudden fall in fertility rates across all of the advanced economies in the early 1970s.

We examine the hypothesis that the slowdown in productivity following the Great Recession was in significant part an endogenous response to the contraction in demand that induced the downturn.

The concern that an economy could experience persistent, and in some sense unusual, weakness goes back to Keynes’s General Theory and led Alvin Hansen to coin the term “secular stagnation.”

This paper shows that aging has positive effect on output growth per capital at positive interest rates, due to capital deepening.

We provide a Keynesian growth theory in which pessimistic expectations can lead to very persistent, or even permanent, slumps characterized by high unemployment and weak growth.

We explore the transmission mechanism of income inequality to output.

This paper answers fundamental questions that have preoccupied modern economic thought since the 18th century.

Long-term real interest rates across the world are low, having fallen by about 450 basis points (bps) over the past thirty years.

This paper replaces an earlier version of a paper released in 2014 under the title “A Model of Secular Stagnation.”

Given that this is a panel on that quintessential Enlightenment thinker Adam Smith, I can think of no better way to begin my remarks than to invoke that most enlightened of modern economists, Kenneth Boulding, who in 1971 penned the delightful essay, “After Samuelson, Who Needs Adam Smith?”