The monetary search model by Lagos and Wright (2005) is extended with imperfect information about nominal shocks à la Lucas (1972 and 1973). This framework is useful to estimate the welfare costs of expected and erratic inflation because it provides an avenue to identify the transactions...

The monetary search model by Lagos and Wright (2005) is extended with imperfect information about nominal shocks as in Lucas (1972). An analytical solution exists with logarithmic preferences. In general, individuals hold precautionary balances. Calibrated to United States postwar data, the...