نتایج جستجو برای: model bias

تعداد نتایج: 2188354  

2015
Osman Doğan

In this study, I investigate the necessary condition for the consistency of the maximum likelihood estimator (MLE) of spatial models with a spatial moving average process in the disturbance term. I show that the MLE of spatial autoregressive and spatial moving average parameters is generally inconsistent when heteroskedasticity is not considered in the estimation. I also show that the MLE of pa...

Journal: :Journal of Artificial Intelligence Research 2000

2013
Yanyuan MA Mijeong KIM Marc G. GENTON

We propose semiparametric methods to estimate the center and shape of a symmetric population when a representative sample of the population is unavailable due to selection bias. We allow an arbitrary sample selection mechanism determined by the data collection procedure, and we do not impose any parametric form on the population distribution. Under this general framework, we construct a family ...

1996
Francis Vella Marno Verbeek

This paper presents some two-step estimators for a wide range of parametric panel data models with censored endogenous variables and sample selection bias. Our approach is to derive estimates of the unobserved heterogeneity responsible for the endogeneity/selection bias to include as additional explanatory variables in the primary equation. These are obtained through a decomposition of the redu...

2010
Judea Pearl

This note deals with a class of variables that, if conditioned on, tends to amplify confounding bias in the analysis of causal effects. This class, independently discovered by Bhattacharya and Vogt (2007) and Wooldridge (2009), includes instrumental variables and variables that have greater influence on treatment selection than on the outcome. We offer a simple derivation and an intuitive expla...

2013
Juan Bautista Cabota Francisco Grimaldo Flaminio Squazzoni

This paper examines the impact of strategic behaviour of referees on the quality and efficiency of peer review. We modelled peer review as a process based on knowledge asymmetry and subject to evaluation bias. We built two simulation scenarios to investigate largescale implications of referee behaviour and judgment bias. The first one was inspired by “the luck of the reviewer draw” idea. In thi...

Journal: :Manufacturing & Service Operations Management 2008
A. J. A. Bostian Charles A. Holt Angela M. Smith

In the newsvendor game, the expected-profit-maximizing order quantity is higher in the demand interval when the per-unit profit margin is high, and lower in the demand interval when the per-unit profit margin is low. However, laboratory experiments show a “pull-tocenter” effect: average order quantities are too low when they should be high and vice versa (Schweitzer and Cachon, 2000). We replic...

2012
Yusufcan Masatlioglu Efe A. Ok

We use the revealed preference method to derive a model of individual decision making when one’s endowment provides a reference point that may influence her choices. This model generalizes the classical rational choice model. While the latter views choice as a consequence of “utility maximization,” the model proposed here views choice as arising from “mentally constrained utility maximization,”...

1997
Ronald S. Jarmin Ron Jarmin

In this paper, I measure the impact of manufacturing extension on productivity and sales growth at manufacturing plants. To do this, I match manufacturing extension client data to the Census Bureau’s Longitudinal Research Database (LRD). The LRD contains data for all manufacturing establishments in the U.S. and provides a number of measures of plant performance and characteristics that are meas...

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