Spencer Banzhaf

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We reviewed 103 consecutive acetabular revisions in 92 patients, for whom allograft bone and 1 of 3 alternative acetabular components had been used: Harris-Galante cup (HGC, 38 hips), Müller acetabular roof reinforcement ring (ARR, 39 hips), or Burch-Schneider antiprotrusio reinforcement cage (APC, 26 hips). The mean follow-up was 4.5 (0.3-13) years. 7(More)
Labor mobility is widely viewed as the principal adjustment mechanism to local labor market shocks. Empirically, however, migration is infrequent, and population adjustment is slow and varies markedly between locations. This paper proposes and estimates a model of heterogeneous local labor markets–“cities”–to understand the mechanisms inhibiting labor(More)
Temporal spillovers occur when a conservation program changes what happens to land outside the temporal window of the conservation contract. This may happen when conservation improves land so that returns to non-conservation uses are increased, or when landowners’ preferences become more pro-conservation as they see land flourish under conservation, for(More)
for valuable research assistance. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research. NBER working papers are circulated for discussion and comment purposes. They have not been peer-reviewed or been subject to the review by the NBER Board of Directors that accompanies(More)
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