Knowledge that Transforms

The paper develops a general, "collective" model of household labor supply in which agents are characterized by their own (possibly altruistic) preferences, and household decisions are only assumed to be Pareto efficient. An alternative interpretation is that there are two stages in the internal decision process: agents first share nonlabor income, according to some given sharing rule; then each one optimally chooses his or her own labor supply and consumption. This setting is shown to generate testable restrictions on labor supplies. Moreover, the observation of labor supply behavior is sufficient for recovering individual preferences and the sharing rule (up to a constant). Finally, the traditional tools of welfare analysis can be adapted to the new setting.

It is not unusual for reforming socialist economies to relax wage controls without hardening budget constraints on enterprises or freeing consumer goods prices. This policy can be dangerously destabilizing. While higher wages permit workers to purchase more of some goods, they also tend to exacerbate shortages and to breed waste and corruption. Beyond a certain level, economywide wage hikes will worsen worker welfare. This is true regardless of whether deficit goods are strictly rationed, are sold randomly at official prices to queuing workers, or are offered to workers by "insiders" only at black-market prices. However, the form of allocation does influence the levels of output and welfare.

This paper investigates the feasibility of a monetary policy aimed at pegging the nominal rate of interest. It shows that under general conditions such a policy would produce the well-known cumulative process, despite the fact that there exists a well-behaved rational expectations equilibrium with no tendency for inflation to accelerate or decelerate. The cumulative process shows up as the failure of learning to converge to rational expectations. Specifically, the paper shows, first in a conventional IS-LM model with an expectations-augmented Phillips curve and then in a micro-based finance constraint model, that if people follow any learning rule based on experience that satisfies a weak condition, then the sequence of temporary equilibria under a policy of interest pegging cannot converge. The nonconvergent path that will be observed accords with the familiar cumulative process, in that inflation accelerates if the market rate of interest has been pegged below the natural rate.

We contrast properties of real quantities with those of price levels and stocks of money for ten countries over the last century. Although the magnitude of output fluctuations has varied across countries and periods, relations among real quantities have been remarkably uniform. Properties of price levels, however, exhibit striking differences between periods. Inflation rates are more persistent after World War II than before, and price-level fluctuations are typically procyclical before World War II and countercyclical afterward. Fluctuations in money are less highly correlated with output in the postwar period but are no more persistent than in earlier periods.

We present models in which price discrimination in the context of a two-part price can occur in some competitive markets. Purchases take place in groups, which choose which firms to patronize. While firms are perfectly competitive with respect to groups, they have some market power over individual consumers, who are constrained by their groups' choices. We find that firms will charge an entry fee that is below marginal cost, and the second part of the price is marked up above marginal cost. The markup not only is positive but increases with the quality of the product.

The potential welfare benefits of unemployment insurance, along with the optimal replacement ratio, are studied using a quantitative dynamic general equilibrium model. To provide a role for unemployment insurance, agents in our economy face exogenous idiosyncratic employment shocks and are unable to borrow or insure themselves through private markets. In the absence of moral hazard, replacement ratios as high as .65 are optimal and the welfare benefits of unemployment insurance are quite large. However, if there is moral hazard and the replacement ratio is not set optimally, but is instead set to an empirically plausible value, the economy can be much worse off than it would be without unemployment insurance.

In this paper, we present an overlapping generations model with heterogeneous agents in which human capital investment through formal schooling is the engine of growth. We use simple functional forms for preferences, technologies, and income distribution to highlight the distinction between economies with public education and those with private education. We find that income inequality declines more quickly under public education. On the other hand, private education yields greater per capita incomes unless the initial income inequality is sufficiently high. We also find that societies will choose public education if a majority of agents have incomes below average.

Costs must be incurred if an owner is to enforce private property rights effectively. We show that, in a perfectly competitive economy, private decisions to enforce rights may result in either more or less enforcement than is socially efficient. Cases of multiple stable equilibria occur, and an equilibrium may be locally, but not globally, efficient. Resources may not be employed in their socially most valuable uses, and enforcement may be accompanied by inefficient investment in resource productivity.