Structural VAR, MARMA and open economy models

In this paper we examine a number of issues in the context of structural VAR and MARMA open economy macro models. In particular, we examine whether VAR or MARMA is the more appropriate specification; whether expectations are forward or backward looking, and whether a number of restrictions imposed on such models are supported by empirical evidence. Prior restrictions are imposed by means of Lagrange multipliers, which makes many of the tests noted above routine.