We study how norms can solve distributional conflict inside a clan and the efficient coordination of collective action in a conflict with an external enemy. We characterize a fully non-cooperative equilibrium in a finite game in which a self-enforcing norm coordinates the members on efficient collective action and on a peaceful distribution of the returns of collective action. JEL Classificatio...

We examine the voluntary provision of a public project via binary contributions when contributions may be made over multiple periods. In many situations, early contributors are likely to pay a higher cost than those who wait. We show that in such circumstances the provision of the project always involves delay. Since this game involves coordination on complex, dynamic strategies in the face of ...

We study how norms can solve distributional conflict inside a clan and the efficient coordination of collective action in a conflict with an external enemy. We characterize a fully non-cooperative equilibrium in a finite game in which a self-enforcing norm coordinates the members on efficient collective action and on a peaceful distribution of the returns of collective action. JEL Classificatio...

This paper analyzes an overlapping generation model of public good provision under repeated voting. The public good is financed through age-dependent taxation that distorts human capital investment. Taxes redistribute income both across different skill groups and across generations. We contrast the political equilibria with the Ramsey allocation, and analyze the sources of inefficiency. The pol...

Evidence from recent randomized …eld experiments on community-based monitoring reveals substantial heterogenous treatment e¤ects. Using data from a randomized experiment in primary health in Uganda, we test whether social heterogeneity can explain why some communities managed to push for better health service delivery while others did not. The results suggest that income inequality, and particu...

Previous work on the subclones within Escherichia coli ST131 predominantly involved isolates from Western countries. This study assessed the prevalence and antimicrobial resistance attributed to this clonal group. A total of 340 consecutive, non-duplicated urinary E. coli isolates originating from four clinical laboratories in Hong Kong in 2013 were tested. ST131 prevalence among the total isol...

Are ordinary citizens or political party leaders better positioned to select candidates? While the American primary system lets choose, most democracies rely instead on officials appoint nominate candidates. The consequences of these distinct design choices are unclear: while often informed about candidate qualifications, they may value traits, like loyalty willingness pay for nomination, at od...

ABSTRACT Massive stars are formed in molecular clouds, and produce H ii regions when they evolve onto the main sequence. The expansion of region can both suppress promote star formation vicinity. M17 is a giant cometary near many massive clumps containing starless protostellar sources. It an appropriate target to study effect feedback from previously on nearby star-forming environments. Observa...

Anandins A (1) and B (2), two rare steroidal alkaloids, were isolated from the fermentative broth of a marine actinobacteria Streptomyces anandii H41-59. The gross structures of the two alkaloids were elucidated by spectroscopic methods including HR-ESI-MS, and NMR. Their absolute configurations were confirmed by single-crystal X-ray diffraction analysis and comparison of their experimental and...

Lower spinal structure correlates well with positional behavior among mammals. Nonetheless, the functional morphology of the axial post-crania of australopithecines has received less attention than their appendicular skeletons. This paper presents a detailed description and comparative morphometric analysis of the australopithecine thoracolumbar vertebral series Stw-H8/H41, and examines spinal ...