Un Indicatore di Attività Economica per la Lombardia e per le Province di Milano e Pavia

This paper aims to construct a high-frequency coincident indicator of economic activity for Lombardy and for the provinces of Milan and Pavia, by using the dynamic factor model approach introduced by Stock e Watson (1998a e 1998b). The principal component technique is first used to summarize the information contained in a large dataset in a limited number of common factors capable of capturing the main features of local business fluctuations. The EM (Expectation Maximization) algorithm then allows to compute the desired territorial indicators by taking into account the official annual data on regional GDP or provincial value-added growth.