Table 3 Estimates of the differencing parameter: Data ending at December 2019.

From: A look at the Spanish film industry and its level of persistence

Series (original data)

No terms

An intercept

An intercept and a time trend

SPAIN

0.52 (0.37, 0.70)

0.41 (0.27, 0.61)

0.41 (0.26, 0.61)

EU

0.58 (0.45, 0.73)

0.46 (0.33, 0.63)

0.45 (0.32, 0.63)

USA

0.53 (0.41, 0.68)

0.28 (0.18, 0.42)

0.28 (0.18, 0.42)

LATIN AMERICA

0.60 (0.40, 0.86)

0.59 (0.42, 0.84)

0.59 (0.42, 0.84)

OTHERS

0.63 (0.53, 0.76)

0.60 (0.51, 0.72)

0.60 (0.51, 0.72)

TOTAL

0.50 (0.36, 0.66)

0.16 (0.04, 0.33)

0.16 (0.04, 0.33)

  1. We report the estimates of d in Eq. (3). In parenthesis, the 95% confidence bands for the values of the differencing parameter. In bold, the values corresponding to the selected model for each series. Source: the authors, based on collected data.