A number of studies have found that news shocks account for a large part of the aggregate fl uctuations of the main macroeconomic variables.We show that when taking rational expectations into consideration there is a limit on the size of the variance of the news shocks,which has not been...

Strong evidence now exists both in macro and micro data that price/wage durations are depent on the state of the economy and especially inflation. We embed this dependence in a macro model of the US that otherwise does well in matching the economy s behaviour in the last three decades; it now...