RESEARCH
Cox-McFadden Semiparametric
Estimation for a Class of
Clustered Proportional Hazards, Working Paper.
Jan Ondrich
Abstract
My paper examines the problem of constructing partial and marginal likelihood approaches to estimating proportional hazards for clustered observations. It turns out that the problem is isomorphic to the problem of relaxing the assumption of independent errors in an extreme-value stochastic utility model. McFadden (D. McFadden 1978, “Modelling the Choice of Residential Location.” Paper No. 25 In Spatial Interaction Theory and Planning Models, edited by Anders Karlqvist, Lars Lundqvist, Folke Snickars, and Jörgen W. Weibull. Amsterdam: North Holland, 75-96) characterizes all discrete choice probability models with univariate extreme value disturbances that are consistent with stochastic utility maximization. He then gives sufficient conditions for the copula to be consistent with stochastic utility maximization. The sufficient conditions describe the set of GEV models. My paper shows that the duration baseline is eliminated from the partial likelihood for clustered proportional hazards when the probability that the first failure is the first observed failure can be modeled as a GEV probability.
“The Location Decisions of Foreign Investors in China: Untangling the Effect of Wages Using a Control Function Approach.” 2010. Review of Economics and Statistics 92(1):160-166.
Xuepeng Liu, Mary Lovely, and Jan Ondrich
Abstract
Although studies of aggregate investment flows provide
consistent evidence that capital is attracted to low wages, there is almost
no empirical support for this proposition from plant-level location choice
studies. We examine the provincial location choices of firms investing in
“Changes in Rental Housing Discrimination since 1989.” 2008. Cityscape 10(2):301-330.
Abstract
This study examines the incidence and causes of housing discrimination in
qualitative treatment by rental agents, using national audit data sets from
the 2000 Housing Discrimination Study (HDS 2000) and the 1989 Housing
Discrimination Study (HDS 1989). Using the fixed-effects logit method
described by Chamberlain (1980), we control for unobservable factors shared
by audit teammates and conduct hypothesis tests for the incidence and causes
of discrimination. We find evidence that discrimination is present in HDS
2000 and is caused by both the prejudice of agents and their response to the
prejudice of White clients. We also explore changes in discrimination since
1989 and changes in the causes of discrimination since 1989.
As did previous studies of HDS 1989 and HDS 2000, we find that rental housing discrimination against Blacks still exists but also that it declined significantly between 1989 and 2000. These studies indicate that, since 1989, discrimination against Hispanics has not declined as much or as consistently as has discrimination against Blacks. Our new analysis yields several hints about changes in the causes of discrimination between 1989 and 2000. We find a significant increase in discrimination against Blacks by large rental housing agencies and by Hispanic rental agents. We also find significant decreases in discrimination against Hispanics by female agents and that Hispanic renters with children face less discrimination in 2000 than they did in 1989.
“The
Determinants of Teacher Attrition in Upstate
Ondrich, Jan, Emily Pas, and John Yinger
Abstract
Statistics, 85(4): 854-873.
Abstract
Potential home buyers may initiate contact with a real estate agent by asking to see a particular advertised house. This paper asks whether an agent's response to such a request depends on the race of the buyer or on whether the house is located in an integrated neighborhood. Like previous research about the causes of housing discrimination, this paper uses data from fair housing audits, a matched-pair technique for comparing the treatment of equally qualified black and white home buyers. However, we shift the focus from differences in the treatment of paired buyers to agent decisions concerning an individual house. Using a sample of all houses seen during the 1989 national Housing Discrimination Study, we estimate a random-effect, multinomial logit model to explain a real estate agent's joint decisions concerning whether to show each house to a black auditor and to a white auditor. We find evidence that agents interpret an initial housing request as an indication of a customer's preferences, but also are more likely to withhold a house from all customers when it is in an integrated suburban neighborhood (redlining). Moreover, agents' marketing efforts increase with asking price for white, but not for black, customers; blacks are more likely than whites to see houses in suburban, integrated areas (steering); and the houses agents show are more likely to deviate from the initial request when the customer is black than when the customer is white. These three findings are consistent with the possibility that agents act upon the belief that some types of transactions are relatively unlikely for black customers (statistical discrimination).
“The
Liberalization of Maternity
Ondrich, Jan, Katharina K. Spiess, Qing Yang, and Gert G. Wagner
Abstract
German federal law has increased the potential duration of maternity leave
five times since 1985. A theoretical model demonstrates that the cumulative
return probability at potential duration cannot decline unless the mother's
employment conditions or career expectations change. We estimate return to
work hazards from the German Socio-Economic Panel for women bearing children
in the period 1984–1991 and predict cumulative return probabilities for
first-time mothers and mothers with a previous birth. The pattern of
cumulative return probabilities as potential duration increases is
consistent with the hypothesis that employment conditions or career
expectations frequently change for mothers taking longer leaves. Copyright Kluwer Academic Publishers.