The Feldstein–Horioka puzzle in South Africa: A fractional cointegration approach

The Feldstein–Horioka (FH) puzzle, that is the strong correlation between saving and investment in a world where obstacles to capital mobility are limited, has been studied extensively since it was exposed in 1980. Even though the theoretical and empirical literature has examined many of its potential causes, the puzzle persists. This paper aims at shedding further light on the issue by investigating the relationship between saving and investment in South Africa since 1946 using fractional integration and cointegration techniques to account for high persistence in the series. We find evidence of fractional cointegration between saving and investment, indicating some degree of persistence in the gap between the two variables. We also find a structural break in saving and investment ratios to GDP around 1980, which roughly coincides with the start of a financial deregulation process in South Africa. While fractional cointegration holds before the break, it does not thereafter. In other words, while the FH puzzle is observed before the start of financial deregulation, it subsequently disappears. This suggests that financial deregulation may have loosened the link between saving and investment.     

Green intellectual capital and ambidextrous green innovation: The impact on environmental performance

This study relies on a unique synthesis of ambidexterity theory and the natural resource orchestration approach to investigate how green intellectual capital elements, namely green human, structural, and relational capital, along with ambidextrous green innovation, trigger a synergy in favor of environmental performance. In particular, this paper primarily aims to test the mediating role of ambidextrous green innovation in the relationship between green intellectual capital and environmental performance. Based on a survey of 105 Iranian public listed companies, the results indicate that green intellectual capital elements are not directly associated with environmental performance. Instead, they influence environmental performance only through the channel of ambidextrous green innovation as a mediating variable. This is the first study to simultaneously embed the resource orchestration theory in the green intellectual capital and ambidexterity literature. The findings of the current study offer new insights into the issue of how organizations gain maximum benefit from the orchestration of their various green assets and capabilities, including green intellectual capital and ambidextrous green innovation.