Mayoral, Laura; Dolado, Juan J.; Gonzalo, Jesús - In: Journal of Applied Econometrics 18 (2003) 2, pp. 137-155
This paper investigates the time series properties of partisanship for five political parties in Spain. It is found that pure fractional processes with a degree of integration, d, between 0.6 and 0.8 fit the time-series behaviour of aggregate opinion polls for mainstream parties quite well,...