Date Added: Mar 2011
The purpose of this paper is to explain both the need and the procedures of unit-root testing to a wider audience. The topic of stationarity testing in general and unit root testing in particular is one that covers a vast amount of research. The authors have been discussing the problem in four different settings. First they investigate the nature of the problem that motivated the study of unit-root processes. Second they present a short list of several traditional as well as more recent univariate and panel data tests.