Template-type: ReDif-Paper 1.0 Author-Name: Solberger, M. Author-workplace-name: Externe publicaties SBE Author-Name: Zhou, X. Author-workplace-name: Externe publicaties SBE Title: LM-type tests for idiosyncratic and common unit roots in the exact factor model with AR(1) dynamics Abstract: Recent developments within the panel unit-root literature have illustrated how the exact factor model serves as a parsimonious framework and allows for consistent maximum likelihood inference even when it is misspecified contra the more general approximate factor model. In this paper we consider an exact factor model with AR(1) dynamics and propose LM-type tests for idiosyncratic and common unit roots. We derive the asymptotic distributions and carry out simulations to investigate size and power of the tests in finite samples, as well as compare the performance with some existing tests. Series: GSBE Research Memoranda Creation-Date: 20130101 Number: 059 File-URL: https://cris.maastrichtuniversity.nl/ws/files/1391472/guid-90c33684-415f-40a0-a7d4-3afa00c0a468-ASSET1.0.pdf File-Format: application/pdf File-Size: 379438 Handle: Repec:unm:umagsb:2013059 DOI: 10.26481/umagsb.2013059