Using a field experiment in a 401(k) plan, we measure the effect of disseminating information about peer behavior on savings. Low-saving employees received simplified plan enrollment or contribution increase forms. A randomized subset of forms stated the fraction of age-matched coworkers participating in the plan or age-matched participants contributing at least 6% of pay to the plan. We docume...

BACKGROUND Phase II cancer studies are undertaken to assess the activity of a new drug or a new treatment regimen. Activity is sometimes defined in terms of a survival probability, a binary outcome such as one-year survival that is derived from a time-to-event variable. Phase II studies are usually designed with an interim analysis so they can be stopped if early results are disappointing. Most...

TAX PROPOSALS: Currently, the combination of worker and employer contributions in a defined contribution plan is capped by the federal tax code at the lesser of $49,000 per year or 100 percent of a worker's compensation (participants over age 50 can make additional "catch-up" contributions). As part of the effort to lower the federal deficit and reduce federal "tax expenditures," two major refo...

The Brundtland Report suggested that there are close causal links between environmental change and poverty. However, the empirical evidence of the effects of poverty on the use made of environmental assets or natural capital is ambiguous. This paper focuses on the relation between poverty and the relative importance of natural and produced capital. Poverty affects stocks of natural and produced...

We study the role an illiquid durable consumption good plays in determining the level of precautionary savings and the distribution of wealth in a standard Aiyagari model (i.e. a model with heterogeneous agents, idiosyncratic uncertainty, and borrowing constraints). Transactions costs induce an inaction region over which the durable stock and the associated user cost are not adjusted in respons...

This paper uses data from Uganda’s largest incumbent microfinance institution to analyze the impact of entry by competing lenders on client behavior. We examine the geographic placement decisions of competitors, and find that lenders of different types cluster spatially and have pushed into rural areas in recent years. We observe that increased competition induces a decline in repayment perform...

Economic agents in the transition economies are subject to tight credit constraints, which are more pronounced during bad state of nature. Thus, adverse shocks to commodity prices in the world market can force them to reduce savings by a larger amount than they would otherwise have. Empirical analysis using a dynamic panel model and data from 21 transition economies confirm that most of the det...

Individuals across the world often use high-transaction-cost savings devices, even when lower-cost technologies are available. I study this phenomenon via a field experiment where access to ATM cards was randomly assigned to 1,100 newly opened bank accounts in rural Kenya. These cards reduced withdrawal fees by over 50 percent. While the cards increased overall account use, the positive treatme...