Discounting Nordhaus

This paper evaluates Nordhaus’s neoclassical complaints about the Stern Review from the vantage point of classical growth theory. Nordhaus argues that the Stern Review exaggerates the effects of global warming because it uses a discount rate that is well below the market rate of return on capital. From the perspective of classical growth theory, Nordhaus’s belief in choosing preference parameters for the social planner based on observed market rates of return filtered through the Ramsey equation is equivalent to assigning the preferences of the capitalist agents to the social planner. This equivalence is an implication of the Cambridge Theorem, which interprets the Ramsey equation as the saving function of the capitalist agents. The classical theory of growth interprets the market return to capital as a reflection of the property relations of capitalist society that does not offer the social planner any information that would be useful in resolving the problem of global warming. Contrary to the viewpoint of neoclassical economic theory, the market return to capital offers no information about preferences for the social welfare function or about the putative “marginal product” of conventional capital.Global warming, Stern Review, Discounting, Ramsey equation, Cambridge equation, Cambridge Theorem

Falling into the Liquidity Trap: Notes on the Global Economic Crisis

This paper examines the underlying structural imbalances leading up to the Great Recession of 2007-2009 from the vantage point of Hyman Minsky’s theory of the liquidity trap. The traditional approach to the liquidity trap focuses on the zero interest rate boundary, while Minsky’s theory focuses on three conditions that make investment spending unresponsive to monetary policy: low underlying ex post profitability of capital, weak expectations about future profitability, and uncertainty about prospective yields. The paper structures an empirical investigation of profitability and accumulation around these three factors. The Great Recession was preceded by an unbalanced recovery in which residential investment led demand while business fixed investment was structurally weak, given the strong ex post profitability of capital and the low interest rate environment. It is hypothesized that increased import penetration and concerns about the sustainability of profitability eroded both expectations and confidence about prospective yields. The Great Recession appears in this and several other dimensions to be a crisis of disproportionality.

"Tinbergen Rules the Taylor Rule"

This paper elaborates a simple model of growth with a Taylor-like monetary policy rule that includes inflation targeting as a special case. When the inflation process originates in the product market, inflation targeting locks in the unemployment rate prevailing at the time the policy matures. Even though there is an apparent NAIRU and Phillips curve, this long-run position depends on initial conditions; in the presence of stochastic shocks, it would be path dependent. Even with an employment target in the Taylor Rule, the monetary authority will generally achieve a steady state that misses both its targets since there are multiple equilibria. With only one policy instrument, Tinbergen's Rule dictates that policy can only achieve one goal, which can take the form of a linear combination of the two targets.

Can Rescheduling Explain the New Jersey Minimum Wage Studies?

This paper interprets the New Jersey minimum wage studies of Card and Krueger and their critics, Neumark and Wascher, through a scheduling model. The former found an increase in the number of workers in New Jersey fast-food restaurants after the state minimum wage was increased, while the latter found a decline in the total payroll hours of New Jersey restaurants. The scheduling model predicts that firms will substitute workers for hours per worker after a wage increase, which is consistent with both studies. Evidence from a subset of restaurants that reported both workers and hours data to Neumark and Wascher supports this interpretation. The New Jersey minimum wage appears to have redistributed income effectively to the targeted population by raising wages and reducing weekly hours per worker by just over one hour without causing any job loss.

Profit-Led Growth and the Stock Market

This paper presents a simple stock-flow consistent model of corporate capitalism with a financial market for firm equities issued by managers as part of their investment plan with the investment rate in turn sensitive to the q-ratio, workers who save for life-cycle motives, and capitalist rentier households who save from a bequest motive. The model assumes full capacity utilization; saving and investment decisions are co-ordinated through changes in the valuation of the capital stock or q-ratio. Changes in valuation can induce enough investment and capitalist consumption to fill the demand gap left by a reduction in the wage share. But unless there is a strong sensitivity of investment to the q- ratio, the increased profitability will be dissipated in a profit-led stock market boom. The model helps resolve the neoliberal paradox of rising profitability with little growth. It also clarifies the relationship between classical and Keynesian growth models which can be seen as special cases arising from limiting values of the investment sensitivity to the q-ratio

Notes on Covid-19, Potential GDP, and Hysteresis

This note provides a model framework for thinking about stabilization policies in the presence of hysteresis after a negative shock like the Covid-19 pandemic. Headline measures of so-called potential GDP published by the Congressional Budget Office represent only one of many possible inflation- neutral trajectories for output. The term potential GDP is misleading since potential implies a unique limit on output. It is much more accurate to consider a range of possible trajectories or multiple equilibria. Repairing the damages from a shock will require overshooting the inflation target and running the economy above its inflation-neutral equilibrium in order to re- store the status quo ante level of output and employment. The model assumes constant trend growth so that path dependence takes the form of pure output-level effects

"Why Is The Rate of Profit Still Falling?"

This paper elaborates a fixed-coefficient, capital, labor, non-raw material intermediates, raw materials production model; estimates the wage share-profit rate frontier associated with it for U.S. manufacturing from 1949 to 1986; and suggests the following explanation of declining profitability. From 1949 to 1970, a rising wage share drove the manufacturing industries up along the wage-profit frontier. Declines in relative raw material prices shifted the frontier out in this period. From 1970 to 1986, raw material prices shocks shifted the frontier in, but as raw material prices declined in the 1980s, the failure of either the wage share or the rate of profit to recover to their previous levels suggests that a secular decline in the output-capital ratio has rotated the frontier inwards. This finding has significance for the tneory of technical change.

"Macroeconomic Profitability: Theory and Evidence"

This paper gives an account of recent work on the measurement, statistical analysis, and theoretical analysis of macroeconomic profitability. Measurement issues include the treatment of holding gains on physical assets and net financial liabilities, national income accounting practices and recent revisions, and the use of accounting rates of return. Statistical work has focused on the identification of trends and shifts in profit rates not caused by cyclical fluctuations, and various theoretical explanations have been offered for the generally low rates of return that appeared in the 1970s. These include capital deepening stimulated by a reduction in the cost of capital funds; profit squeezes caused by some combination of slower productivity growth, real wage push, and raw material price inflation; declining capital productivity; and changes in effective tax rates. The paper raises several questions. The use of a constant mark-up pricing model in reduced form to control for cyclical effects on profitability is questioned because of evidence that the mark-up is variable, and some suggestions for incorporating this evidence into applied studies of profitability are offered. Several empirical puzzles are identified. The apparent decline in capital productivity is one; the more pronounced decline in before-tax profitability compared to after-tax profitability is another.

Path Dependence and Stagnation in a Classical Growth Model

This paper embeds a technical progress function in a classical growth model and studies the effects of permanent changes in parameters and temporary shocks such as pandemics. Technical change is driven by dynamic economies of scale and responds to distributional forces: the wage share regulates labor-saving technical change and employment regulates its capital- using bias. The model features path dependence in the employment-population rate and the output-capital ratio. Population growth and distribution can respond to the employment rate. Interpreted through the model, secular stagnation under neoliberal capitalism has been driven by a combination of diminished investment and reduced worker bargaining power more than by slower technical change and population growth. A temporary unfavorable shock to the output- capital ratio will permanently reduce the employment rate. In the fully endogenous model, this will increase the profit share and reduce the rates of technical change, capital accumulation, and population growth

Shadow Banks and the Collateral Multiplier

With an emphasis on contributing to macroeconomic pedagogy we examine the collateral multiplier by comparing it to the traditional money multiplier in a simplified framework of traditional banking and shadow banking in which government bonds are the core assets. While the money multiplier is a measure of the ability of the banking system to intermediate sovereign debt by creating deposits, the collateral multiplier is a measure of the shadow banking system’s ability to intermediate sovereign debt by creating shadow money. It also measures the degree of re-use of sovereign debt as collateral. In this setup, the collateral multiplier is defined as the ratio between dealer banks’ matched book repo activity relative to their trading book. Using the New York Fed’s Primary Dealer Statistics data, we empirically estimate the collateral multiplier for U.S. Treasury repo collateral. Our model and empirical results shed light on the transmission mechanisms of monetary policy channeled through shadow banks and on the U.S. Treasuries market turmoil induced by COVID-19 in March 2020