In this paper the integer-valued autoregressive model of order one, contaminated with additive outliers is studied in some detail. Moreover, parameter estimation is also addressed. Supposing that the timepoints of the outliers are known but their sizes are unknown, we prove that the conditional...

This paper aims to identify the barriers to innovation that influence the innovation capability of Portuguese industrial firms. The literature review about innovation makes use of two references approaches: (i) the systemic; and (ii) the networks and inter-organizational relationships. The...