Most panel unit root tests are designed to test the joint null hypothesis of a unit root for each individual series in a panel. After a rejection, it will often be of interest to identify which series can be deemed to be stationary and which series can be deemed nonstationary. Researchers will...

This chapter provides a general framework for the distribution problem and details formulae that are frequently useful in the derivation of sampling distributions and moments. It also provides an account of the genesis of the Edgeworth, Nagar, and saddlepoint approximations. The chapter...