How Changes in Labor Demand Affect Unemployed Workers
分析劳动力需求有利变化如何影响求职行为，发现这些变化虽提高保留工资，但不一定缩短失业期或提高再就业工资，可能导致短期菲利普斯曲线向上倾斜。
This study analyzes the manner in which certain favorable shifts in labor demand affect job search. Although all shifts increase reservation wages, they do not necessarily decrease expected unemployment spell durations and increase expected post-unemployment wages, so that upward-sloping short-run Phillips curves may occur. A result due to Chamberlain is used to demonstrate that if the wage offer distribution is restricted to be logconcave, two of the shifts guarantee downward-sloping Phillips curves. For one of these two shifts, previous research by Flinn and Heckman used logconcavity in a different manner to achieve properly shaped Phillips curves.