The objective of this study is to examine the portfolio theory that suggests that diversification can potentially reduce the return variance and the probability of failure of a portfolio. The current study is to investigate the diversification measure by means of Hershman-Herfindahl index, and applies the " diversification index " proposed by Demsetz & Strahan (1997) by scaling systematic risk ...

As the cornerstone of operation listed companies, enterprise strategy has attracted more and attention. Diversification is a company level that many companies choose to adopt. However, diversification advantages disadvantages. How prevent risks from worthy our study. Therefore, this paper selects Yunnan Baiyao as case company, specifically discusses its strategy, puts forward adjustment suggest...

Insects contain more than half of all living species, but the causes of their remarkable diversity remain poorly understood. Many authors have suggested that herbivory has accelerated diversification in many insect clades. However, others have questioned the role of herbivory in insect diversification. Here, we test the relationships between herbivory and insect diversification across multiple ...

This paper brings together evolutionary economics and resource-based approaches to the study of the firm and focuses them upon the issue of technological diversification. Despite the empirical observations that the world is increasingly technologically complex, technological diversification is little studied. Traditional researches into diversification within the firm have still tended to focus...

This dissertation investigates how institutional environments and firm resources influence firm scope. Building on strategy and international business literatures, I propose that institutional environments influence firm scope through the impacts on both the development of internal resources and the availability of external resources. In Chapter 2, I disaggregate the concept of institutional di...

This paper summarizes stratificational theory, and applies its linguistic methods in a sememic analysis of English prepositions. The phenomenon of interlocking diversification is shown to be quite generally present among the prepositions. Also, the analysis of prepositions is shown to entail a partial sememic analysis of other words; it therefore provides a starting point for the sememic analys...

Hybridization and insect pollination are widely believed to increase rates of plant diversification. The extreme diversity of figs (Ficus) and their obligate pollinators, fig wasps (Agaonidae), provides an opportunity to examine the possible role of pollinator-mediated hybridization in plant diversification. Increasing evidence suggests that pollinator sharing and hybridization occurs among fig...

Ecological diversification presents an enduring puzzle: how do novel ecological strategies evolve in organisms that are already adapted to their ecological niche? Most attempts to answer this question posit a primary role for genetic drift, which could carry populations through or around fitness "valleys" representing maladaptive intermediate phenotypes between alternative niches. Sexual select...