Abhijit V. Banerjee

A Simple Model of Herd Behavior

We analyze a sequential decision model in which each decision maker looks at the decisions made by previous decision makers in taking her own decision. This is rational for her because these other decision makers may have some information that is important for her. We then show that the decision rules that are chosen by optimizing individuals will be characterized by herd behavior; i.e., people will be doing what others are doing rather than using their information. We then show that the resulting equilibrium is inefficient.

The Miracle of Microfinance? Evidence from a Randomized Evaluation

Microcredit has spread extremely rapidly since its beginnings in the late 1970s, but whether and how much is helps the poor is the subject of intense debate. This paper reports on the …rst randomized evaluation of the impact of introducing microcredit in a new market. Half of 104 slums in Hyderabad, India were randomly selected for opening of an MFI branch while the remainder were not. We show that the intervention increased total MFI borrow.

History Institutions and Economic Performance: The Legacy of Colonial Land Tenure Systems in India

We analyze the colonial land revenue institutions set up by the British in India, and show that differences in historical property rights institutions lead to sustained differences in economic outcomes. Areas in which proprietary rights in land were historically given to landlords have significantly lower agricultural investments and productivity in the post-independence period than areas in which these rights were given to the cultivators. These areas also have significantly lower investments in health and education. These differences are not driven by omitted variables or endogeneity problems; they probably arise because differences in historical institutions lead to very different policy choices.

Growth Theory through the Lens of Development Economics

Growth theory has traditionally assumed the existence of an aggregate production function, whose existence and properties are closely tied to the assumption of optimal resource allocation within each economy. We show extensive evidence, culled from the micro-development literature, demonstrating that the assumption of optimal resource allocation fails radically. The key fact is the enormous heterogeneity of rates of return to the same factor within a single economy, a heterogeneity that dwarfs the cross-country heterogeneity in the economy-wide average return. Prima facie, we argue, this evidence poses problems for old and new growth theories alike. We then review the literature on various causes of this misallocation. We go on to calibrate a simple model which explicitly introduces the possibility of misallocation into an otherwise standard growth model. We show that, in order to match the data, it is enough to have misallocated factors: there also needs to be important fixed costs in production. We conclude by outlining the contour of a possible non-aggregate growth theory, and review the existing attempts to take such a model to the data.

Currency Crises and Monetary Policy in an Economy with Credit Constraints

This paper presents a simple model of currency crises which is driven by the interplay between the credit constraints of private domestic firms and the existence of nominal price rigidities. The possibility of multiple equilibria, including a ‘currency crisis’ equilibrium with low output and a depreciated domestic currency, results from the following mechanism: If nominal prices are ‘sticky’, a currency depreciation leads to an increase in the foreign currency debt repayment obligations of firms, and thus to a fall in their profits; this reduces firms’ borrowing capacity and therefore investment and output in a credit-constrained economy, which in turn reduces the demand for the domestic currency and leads to a depreciation. We examine the impact of various shocks, including productivity, fiscal, or expectational shocks. We then analyze the optimal monetary policy to prevent or solve currency crises. We also argue that currency crises can occur both under fixed and flexible exchange rate regimes as the primary source of crises is the deteriorating balance sheet of private firms.

A Theory of Misgovernance

This paper tries to explain why government bureaucracies are often associated with red tape, corruption, and lack of incentives. The paper identifies two specific ingredients that together can provide an explanation: the fact that governments often act precisely in situations where markets fail and the presence of agency problems within the government. We show that these problems are exacerbated at low levels of development and in bureaucracies dealing with poor people. We also argue that we need to posit the existence of a welfare-oriented constituency within the government in order to explain red tape and corruption.

Thy Neighbor's Keeper: The Design of a Credit Cooperative with Theory and a Test

Economists now appreciate that resource allocation in less economically developed economies is profoundly influenced by nonfirm economic institutions. However, our theories of nonfirm institutions often suggest different answers to many questions including those of policy. This paper illustrates a method for discriminating between alternative theories using data from German credit cooperatives from nineteenth and early twentieth century Germany. We build a model of credit cooperatives designed to provide monitoring incentives and test this using nineteenth century data.

What Is Middle Class about the Middle Classes around the World

This paper uses household surveys from 13 developing countries to describe consumption choices, health and education investments, employment patterns and other features of the of the economic lives of the “middle classes” defined as those whose daily consumption per capita is between

Empowerment and Efficiency: Tenancy Reform in West Bengal

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Do Firms Want to Borrow More? Testing Credit Constraints Using a Directed Lending Program

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