Microscopic mass formulae

By assuming the existence of a pseudopotential smooth enough to do Hartree-Fock variations and good enough to describe nuclear structure, we construct mass formulae that rely on general scaling arguments and on a schematic reading of shell model calculations. Fits to 1751 known binding energies for N,Z$\geq 8$ lead to RMS errors of 614 keV with 14 parameters and 388 keV with 28 parameters. The latter is easily reduced to a 20 parameter form at 423 keV.Comment: 6 pages, REVTEX dialec

Dams

The construction of large dams is one of the most costly and controversial forms of public infrastructure investment in developing countries, but little is known about their impact. This paper studies the productivity and distributional effects of large dams in India. To account for endogenous placement of dams we use GIS data and the fact that river gradient affects a district's suitability for dams to provide instrumental variable estimates of their impact. We find that, in a district where a dam is built, agricultural production does not increase but poverty does. In contrast, districts located downstream from the dam benefit from increased irrigation and see agricultural production increase and poverty fall. Overall, our estimates suggest that large dam construction in India is a marginally cost-effective investment with significant distributional implications, and has, in aggregate, increased poverty.

Participation and Investment Decisions in a Retirement Plan: The Influence of Colleagues' Choices

This paper investigates whether peer effects play an important role in retirement savings decisions. We use individual data from the staff of a university to study whether individual decisions to enroll in a Tax Deferred Account plan sponsored by the university (and the choice of the mutual fund vendor for people who choose to enroll) are affected by the decisions of other employees in the same department. To overcome the identification problems, we separate the departments into sub-groups (along gender, status, age, and tenure lines) and we instrument the average participation of each peer group by the salary or tenure structure in this group. Our results suggest that peer effects are important. We find significant own-group peer effect on participation and on vendor's choice, but no cross-group peer effects.

Dams

The construction of large dams is one of the most costly and controversial forms of public infrastructure investment in developing countries, but little is known about their impact. This paper studies the productivity and distributional effects of large dams in India. To account for endogenous placement of dams we use GIS data and the fact that river gradient affects a district's suitability for dams to provide instrumental variable estimates of their impact. We find that, in a district where a dam is built, agricultural production does not increase but poverty does. In contrast, districts located downstream from the dam benefit from increased irrigation and see agricultural production increase and poverty fall. Overall, our estimates suggest that large dam construction in India is a marginally cost-effective investment with significant distributional implications, and has, in aggregate, increased poverty.Dams, Development Planning, Program Evaluation, India

Women as Policy Makers: Evidence from a India-Wide Randomized Policy Experiment

This paper uses political reservations for women in India to study the impact of women's leadership on policy decisions. In 1998, one third of all leadership positions of Village Councils in West Bengal were randomly selected to be reserved for a woman: in these councils only women could be elected to the position of head. Village Councils are responsible for the provision on many local public good in rural areas. Using a data set we collected on 165 Village Councils, we compare the type of public goods provided in reserved and unreserved Villages Councils. We show that women invest more in infrastructure that is directly relevant to the needs of rural women (water, fuel, and roads), while men invest more in education. Women are more likely to participate in the policy-making process if the leader of their village council is a woman.

The Impact of Education on Fertility and Child Mortality: Do Fathers Really Matter Less Than Mothers?

This paper takes advantage of a massive school construction program that took place in Indonesia between 1973 and 1978 to estimate the effect of education on fertility and child mortality. Time and region varying exposure to the school construction program generates instrumental variables for the average education in the household, and the difference in education between husband and wife. We show that female education is a stronger determinant of age at marriage and early fertility than male education. However, female and male education seem equally important factors in reducing child mortality. We suggest that the OLS estimate of the differential effect of women's and men's education may be biased by failure to take in to account assortative matching.

The Role of Information and Social Interactions in Retirement Plan Decisions: Evidence from a Randomized Experiment

This paper analyzes a randomized experiment to shed light on the role of information and social interactions in employees' decisions to enroll in a Tax Deferred Account (TDA) retirement plan within a large university. The experiment encouraged a random sample of employees in a subset of departments to attend a benefits information fair organized by the university, by promising a monetary reward for attendance. The experiment more than tripled the attendance rate of these treated individuals (relative to controls), and doubled that of untreated individuals within departments where some individuals were treated. TDA enrollment 5 and 11 months after the fair was significantly higher in departments where some individuals were treated than in departments where nobody was treated. However, the effect on TDA enrollment is almost as large for individuals in treated departments who did not receive the encouragement as for those who did. We provide three interpretations, differential treatment effects, social network effects, and motivational reward effects, to account for these results.

Intrahousehold Resource Allocation in Côte D'ivoire: Social Norms, Separate Accounts and Consumption Choices

In Côte d'Ivoire, as in much of Africa, husbands and wives farm different crops on separate plots. These different crops are differentially sensitive to particular kinds of rainfall shocks. We find that conditional on overall household expenditure, the composition of expenditure is sensitive to the gender of the recipient of a rainfall shock. For example, rainfall shocks associated with high women's income shift expenditure towards food. Social norms constrain the use of profits from yam cultivation, which is carried out by men. Correspondingly, we find that rainfall-induced fluctuations in income from yams are transmitted to expenditures on education and food, not to expenditures on private goods. We reject the hypothesis of complete insurance within households, even with respect to publicly observable weather shocks. Different sources of income are allocated to different uses depending upon both the identity of the income earner and upon the origin of the income.Intra-household Allocation, Insurance, Social Norms, Mental Accounts