GMM provides a computationally convenient estimation method and the resulting estimator can be shown to be consistent and asymptotically normal under the fairly moderate regularity conditions. It is widely known that the information content in the population moment condition has impacts on the...

This dissertation consists of three essays on modeling and parameter estimation for covariance non-stationary processes. The first essay considers the non-linear deformation of time scale for G(lambda)-stationary processes developed by Jiang, Gray and Woodward [2006]. After the appropriate...

This dissertation revisits the literature on the role of exchange rate flexibility in smoothing the adjustments of the economy to different disturbances. Recently, the role of flexible exchange rates in stabilizing the economy against real shocks has been challenged by the new open economy...