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Author:Knowles, John 

Working Paper
Racial profiling or racist policing? bounds tests in aggregate data

State-wide reports on police traffic stops and searches summarize very large populations, making them potentially powerful tools for identifying racial bias, particularly when statistics on search outcomes are included. But when the reported statistics conflate searches involving different levels of police discretion, standard tests for racial bias are not applicable. This paper develops a model of police search decisions that allows for non-discretionary searches and derives tests for racial bias in data that mixes different search types. Our tests reject unbiased policing as an explanation ...
Working Papers , Paper 2004-012

Working Paper
More on marriage, fertility, and the distribution of income

This paper describes an overlapping-generations model of marriage, fertility, and income distribution.
Working Papers (Old Series) , Paper 9904

Working Paper
Fertility Shocks and Equilibrium Marriage-Rate Dynamics

Why did the marriage probability of single females in France after World War 1 rise 50% above its pre-war average, despite a 33% drop in the male/female singles ratio? We conjecture that war-time disruption of the marriage market generated an abnormal abundance of men with relatively high marriage propensities. Our model of matching over the lifecycle, when calibrated to pre-war data and two war-time shocks, succeeds in matching the French time path under the additional assumption of a pro-natalist post-war preference shock. We conclude that endogeneity issues make the sex ratio a potentially ...
Working Papers , Paper 2015-7



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