In this article we model the inflationary inertia in Brazil, as measured by the monthly series of IPCA (Aggregate Consumer Prices Index), for the period of inflationary transition from August of 1994 until January of 2003. The concept of inflationary inertia is defined as the value of the first...

D-order processes is a sort of important stochastic processes, it is a class of useful stochastic processes in practices, its study is very value. In this paper, we study 1-order processes using haar wavelet and wavelet transform on R. We study its some properties and wavelet expansion.