The origins of agriculture: Population growth during a period of declining health

The increase in the Neolithic human population following the development of agriculture has been assumed to result from improvements in health and nutrition. Recent research demonstrates that this assumption is incorrect. With the development of sedentism and the intensification of agriculture, there is an increase in infectious disease and nutritional deficiencies particularly affecting infants and children.Declining health probably increased mortality among infants, children and oldest adults. However, the productive and reproductive core would have been able to respond to this increase in mortality by reducing birth spacing. That is, agricultural populations increased in size, despite higher mortality, because intervals between births became shorter.     

On the Equivalence of Bayesian and Dominant Strategy Implementation

We consider a standard social choice environment with linear utilities and independent, one‐dimensional, private types. We prove that for any Bayesian incentive compatible mechanism there exists an equivalent dominant strategy incentive compatible mechanism that delivers the same interim expected utilities for all agents and the same ex ante expected social surplus. The short proof is based on an extension of an elegant result due to Gutmann, Kemperman, Reeds, and Shepp (1991). We also show that the equivalence between Bayesian and dominant strategy implementation generally breaks down when the main assumptions underlying the social choice model are relaxed or when the equivalence concept is strengthened to apply to interim expected allocations.     

The paradox of development planning

Economic planning has become the chief hope of developing countries for ultimately achieving parity with advanced countries in living standards and social progress. Yet, given the different degree of effective control over the economic environment that distinguishes advanced from developing countries, planning is apt to entail a low probability of failure only in the former, where it is less needed or desired. Magnitudes difficult to control in developing countries include agricultural output and export proceeds, yet are the most critical to the economic stability and initial advancement of these societies. Also seriously lacking are reliable and accurate sources of data on which development plans must be based. Acceptance of planning in low-income countries should be conditioned by an awareness that it will not close the development gap overnight and must incorporate broad tolerances with respect to targets.     

Patterns of intimate partner violence: correlates and outcomes

Battered women experience different constellations of violence and abusive behavior characterized by various combinations of physical violence, sexual violence, psychological abuse, and stalking. The goals of the current study were to determine whether it was possible to identify empirically derived and meaningful patterns of intimate partner violence (IPV) and to examine correlates and outcomes of the IPV patterns. Three IPV patterns were identified using cluster analysis. Pattern 1 was characterized by moderate levels of physical violence, psychological abuse, and stalking but little sexual violence. Pattern 2 was characterized by high levels of physical violence, psychological abuse, and stalking but low levels of sexual violence. Pattern 3 was characterized by high levels of all violence types. IPV Pattern 3 was associated with the highest prevalence of posttraumatic stress disorder and depression, and IPV Pattern 2 had the highest levels of revictimization during the year following recruitment. The clinical and policy implications of the findings are discussed.