TITLE

The Effect of Outliers on Regression Analysis: Regime Type and Foreign Direct Investment

AUTHOR(S)
Seung-Whan Choi
PUB. DATE
April 2009
SOURCE
Quarterly Journal of Political Science;2009, Vol. 4 Issue 2, p153
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The presence of outliers and influential cases can dramatically change the magnitude of regression coefficients and even the direction of coefficient signs (i.e., from positive to negative or vice versa). When researchers ignore abnormal observations, especially with respect to dependent variables, their empirical results can be misleading. Unfortunately, the fact remains underappreciated in studies of political science. To expound upon the outlier issue, I reexamine an empirical study that reports on two opposing effects of democratic institutions on inflows of foreign direct investment (FDI). In doing so, I illustrate the way influential outliers can drastically affect the substantive results of regression analysis. After properly reanalyzing outlying countries, I conclude that democratic countries attract more FDI than authoritarian countries.
ACCESSION #
43811087

 

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