Heterogeneity between unemployed and employed individuals matters for optimal fiscal policy. This paper considers the consequences of welfare heterogeneity between these two groups for the determination of optimal capital and labor income taxes in a model with matching frictions in the labor market. In line with a recent finding in the literature, we find that the optimal capital tax is typically non-zero because it is used to indirectly mitigate an externality along the extensive labor margin that arises from search and matching frictions. However, the consideration of heterogeneity makes our result differ in an important way: even for a well-known parameter configuration (the Hosios condition) that typically eliminates this externality, we show that the optimal capital income tax is still non-zero. We also show that labor adjustment along the intensive margin has an important effect on efficiency at the extensive margin, and hence on the optimal capital tax, independent of welfare heterogeneity. Taken together, our results show that these two empirically-relevant features of the labor market can have a quantitatively-important effect on the optimal capital tax.

We embed the canonical rational expectations competitive storage model into a general equilibrium framework thereby allowing the non-linear commodity price dynamics implied by the competitive storage model to interact with the broader macroeconomy. Our main result is that the endogenous movement in interest rates implied under general equilibrium enhances the effects of competitive storage on commodity prices. Compared to a model in which the real interest rate is fixed, we find that storage in general equilibrium leads to more persistence in commodity prices and somewhat lower volatility. Moreover, the frequency of stockouts is lower in general equilibrium. A key mechanism driving this result is a link between the ability of the household to smooth consumption over time and the level of storage in the stochasic equilibrium. Finally, the model is used to examine the macroeconomic effects of both biofuel subsidies for ethanol producers and, separately, subsidies designed to insulate households from high food prices.

This paper uses disaggregated data from a broad cross-section of countries to empirically assess differences in energy consumption profiles across countries. We find empirical support for the energy ladder hypothesis, which contends that as an economy develops it transits away from a heavier reliance on traditional fuel sources towards an increase in the use of modern commercial energy sources. We also find empirical support for the hypothesis that structural transformation--the idea that as an economy matures, it transforms away from agriculture-based activity into industrial activity and, finally, fully matures into a service-oriented economy--is an important driver for the distribution of end-use energy consumption. However, even when these two hypotheses are taken into account, we continue to find evidence suggesting that the patterns of energy consumption in the BRIC economies are importantly different from those of other economies.

This paper illustrates that the introduction of a money demand distortion into an otherwise standard New Keynesian Open Economy model generates multiple discretionary equilibria. These equilibria arise in the form of expectations traps whereby the monetary authority is trapped into validating expectations of the private sector because failing to do so is costly. One implication of the model is that provided initial inflation expectations are sufficiently anchored the global Friedman rule emerges as an equilibrium under discretion. It is therefore a time-consistent outcome and hence fully sustainable even in absence of a commitment device or reputational considerations.