Quasi-likelihood ratio tests for autoregressive moving-average (ARMA) models are examined. The ARMA models are stationary and invertible with white-noise terms that are not restricted to be normally distributed. The white-noise terms are instead subject to the weaker assumption that they are...

Governments borrow funds to finance the excess of cash payments or interest payments over receipts, usually by issuing fixed income debt and index-linked debt. The goal of this work is to propose a stochastic optimization-based approach to determine the composition of the portfolio issued over a...

Using data derived from a number of stand alone surveys in different countries, this paper explores international differences in the paths of diffusion of new manufacturing technologies. It is observed that diffusion paths are technology specific and that no one country either in Europe or North...

The role of financial factors as constraints to innovation in the UK is explored using data on individual returns to the second and third Community Innovation Surveys. It is found that financial factors do impact upon innovative activity and that impact is more severe in higher tech sectors and...

Using data from the third UK Community Innovation Survey we model the usage of e-business across and within firms in the UK in the year 2000 as a single observation upon an integrated process of inter- and intra-firm diffusion. The intra-firm dimension is a significant extension to standard...