Suchergebnisse

"I derive bounds on price elasticities in a dynamic model that is mis-specified due to optimization frictions such as adjustment costs or inattention. The bounds are a function of the observed effect of a price change on demand, the size of the price change, and the degree of frictions. I measure the degree of frictions by the utility losses agents tolerate to make choices that deviate from the frictionless optimum. I apply these bounds to the literature on taxation and labor supply, allowing for frictions of 1% of consumption in choosing labor supply. Such small frictions reconcile the difference between micro and macro elasticities, extensive and intensive margin elasticities, and several other disparate findings. Pooling estimates from twenty existing studies yields bounds on the intensive margin labor supply elasticity of (0.47,0.54)"--National Bureau of Economic Research web site

"This paper presents new evidence on why unemployment insurance (UI) benefits affect search behavior and develops a simple method of calculating the welfare gains from UI using this evidence. I show that 60 percent of the increase in unemployment durations caused by UI benefits is due to a "liquidity effect" rather than distortions in marginal incentives to search ("moral hazard") by combining two empirical strategies. First, I find that increases in benefits have much larger effects on durations for liquidity constrained households. Second, lump-sum severance payments increase durations substantially among constrained households. I derive a formula for the optimal benefit level that depends only on the reduced-form liquidity and moral hazard elasticities. The formula implies that the optimal UI benefit level exceeds 50 percent of the wage. The "exact identification" approach to welfare analysis proposed here yields robust optimal policy results because it does not require structural estimation of primitives"--National Bureau of Economic Research web site

"Since Feldstein (1999), the most widely used method of calculating the excess burden of income taxation is to estimate the effect of tax rates on reported taxable income. This paper reevaluates the taxable income elasticity as a measure of excess burden when individuals can evade or avoid taxes. In many cases, part of the cost of evasion and avoidance reflects a transfer to another agent in the economy. I show that in such situations, excess burden depends on a weighted average of the taxable income and total earned income elasticities, with the weight determined by the marginal resource cost of sheltering income from taxation. This generalized formula implies that the efficiency cost of taxing high income individuals is not necessarily large despite evidence that their reported incomes are highly sensitive to tax rates"--National Bureau of Economic Research web site

"In an influential paper, Baily (1978) showed that the optimal level of unemployment insurance (UI) in a stylized static model depends on only three parameters: risk aversion, the consumption-smoothing benefit of UI, and the elasticity of unemployment durations with respect to the benefit rate. This paper examines the key economic assumptions under which these parameters determine the optimal level of social insurance. A Baily-type expression, with an adjustment for precautionary saving motives, holds in a very general class of dynamic models subject to weak regularity conditions. For example, the simple reduced-form formula derived here applies with arbitrary borrowing constraints, endogenous insurance markets, and search and leisure benefits of unemployment. A counterintuitive aspect of this result is that the optimal benefit rate appears not to depend on (1) any benefit of UI besides consumption-smoothing or (2) the relative magnitudes of income and substitution effects in the link between UI benefits and durations. However, these parameters enter implicitly in the optimal benefit calculation, and estimating them can be useful in testing whether the values of the primary inputs are consistent with observed behavior"--National Bureau of Economic Research web site

"Studies of the consumption-smoothing benefits of unemployment insurance (UI) have found that the optimal benefit level is very small, perhaps even 0, for conventional levels of risk aversion. In this paper, I derive a formula for the optimal benefit rate in terms of income and price elasticities of unemployment durations, directly inferring risk aversion for the unemployed from their behavioral responses to UI benefits. The optimal rate of social insurance is shown to depend positively on the size of the income elasticity and negatively on the size of the substitution elasticity. I estimate these elasticities using semi-parametric hazard models and variation in UI laws across states and over time. The estimates indicate that income effects account for 70% of the effect of UI on unemployment durations, and yield an optimal replacement rate around 50% of pre-unemployment wages. These results challenge the prevailing view that social safety nets provide minimal welfare gains at a large efficiency cost"--National Bureau of Economic Research web site