Past climatic changes were caused by a slowdown of the thermohaline circulation. We use results from experiments with three climate models to show that the expected cooling due to a slowdown of the thermohaline circulation is less in magnitude than the expected warming due to increasing greenhouse gas concentrations. The integrated assessment model FUND and a meta-analysis of climate impacts are used to evaluate the change in human welfare. We find modest but by and large positive effects on human welfare since a slowdown of the thermohaline circulation implies decelerated warming.

In 1940 the labor force participation rate for married women, husband present, was 14 percent. By 1970 it had increased 26 percentage points to 40 percent. The supply and demand variables associated with this increase have been widely investigated. However, there has been ve'ry little research on the economic effects of wives' labor force participation. (See R. Agarwala and J. Drinkwater, Margaret Carroll, Robert Holbrook and Frank Stafford, Lucy Mallan and Jacob Mincer.) This paper analyzes two economic effects: the effect on the ratio of consumption to income (CIY) and the effect on the ratio of durable goods purchases to income (DurlY). The primary question addressed is: Controlling for total family income and several other variables, what are the differences (if any) in the ratios of CIY and DurlY for working-wife (W-W) and nonworking wife (N-W-W) families? Looked at in another way, the question may be rephrased: How do W-W families use wives' income?

A growing body of evidence indicates that the U.S. economy has become less dynamic in recent years. This trend is evident in declining rates of gross job and worker flows as well as declining rates of entrepreneurship and young firm activity, and the trend is pervasive across industries, regions, and firm size classes. We describe the evidence on these changes in the U.S. economy by reviewing existing research. We then describe new empirical facts about the relationship between establishment-level productivity and employment growth, framing our results in terms of canonical models of firm dynamics and suggesting empirically testable potential explanations.

This paper examines the temperature-mortality relationship over the course of the twentieth-century United States both for its own interest and to identify potentially useful adaptations for coming decades. There are three primary findings. First, the mortality impact of days with mean temperature exceeding 807F declined by 75 percent. Almost the entire decline occurred after 1960. Second, the diffusion of residential air conditioning explains essentially the entire decline in hot day–related fatalities. Third, using Dubin and McFadden’s discrete continuous model, the present value of US consumer surplus from the introduction of residential air conditioning is estimated to be $85– $185 billion (2012 dollars).