Can negative interest rates really affect option pricing? Empirical evidence from an explicitly solvable stochastic volatility model

The profound financial crisis generated by the collapse of Lehman Brothers and the European sovereign debt crisis in 2011 have caused negative values of government bond yields both in the USA and in the EURO area. This paper investigates whether the use of models which allow for negative interest rates can improve option pricing and implied volatility forecasting. This is done with special attention to foreign exchange and index options. To this end, we carried out an empirical analysis on the prices of call and put options on the US S&P 500 index and Eurodollar futures using a generalization of the Heston model in the stochastic interest rate framework. Specifically, the dynamics of the option’s underlying asset is described by two factors: a stochastic variance and a stochastic interest rate. The volatility is not allowed to be negative, but the interest rate is. Explicit formulas for the transition probability density function and moments are derived. These formulas are used to estimate the model parameters efficiently. Three empirical analyses are illustrated. The first two show that the use of models which allow for negative interest rates can efficiently reproduce implied volatility and forecast option prices (i.e. S&P index and foreign exchange options). The last studies how the US three-month government bond yield affects the US S&P 500 index.     

The moderating effects of economic development on innovation and shadow entrepreneurship: grey or pink?

There is currently a renewed surge of interest in informal entrepreneurship around the world. One of the motives stems from how such entrepreneurship shapes and influences a substantial part of the global workforce. However, we may also verify how a major proportion of the research in this field focuses on developing economies and thus justifying the application of such analytical approaches to countries with different levels of economic development as is the case with Europe. Our research objectives, on the one hand, involve analysing the impact of R&D investment on informal entrepreneurship and, on the other hand, the moderating effect of the level of economic development on their innovative capacities and informal entrepreneurship results. To this end, and in accordance with Global Entrepreneurship Monitor, we divide the countries of Europe into two stages of development and may report that the higher the level of economic development, the greater the innovative capacity and, furthermore, the lower informal entrepreneurship becomes. The same holds for R&D investment with its increase being inversely proportionate to informal entrepreneurship. We, therefore, seek to contribute toward a better understanding of the problematic framework of informal entrepreneurship, in particular in the European context.     

Modern rice technology and regional wage differentials in the Philippines

Fear has been widely expressed that the modern rice varieties have created large disparities in regional income distribution, as the productivity gap between favorable and unfavorable rice-production environments widened due to differential technology adoption throughout South and Southeast Asia over the last two decades. Technology affects the income of farm population directly through its effects on productivity and factor use, and indirectly through its effect on factor prices. In particular, the ultimate distributional impact of modern varieties will critically depend on the interregional labor-market adjustments through migration in response to regional wage differentials created by the differential technology adoption, since labor is the main resource of the majority of the rural population. We studied favorable and unfavorable rice-growing villages in the Philippines, and found that adoption of modern varieties during the 1970s was positively related to population growth rate. Contrary to popular belief, no association was observed between wage rates and adoption of modern varieties as of 1986. These findings support the hypothesis that the differential adoption of modern rice varieties induced interregional labor migration toward equalization of wage income across different production environments.     

Reconciling culturalist and rationalist approaches: leadership in the United States and Turkey

This article empirically investigated the invariance and discriminant validity of a six-factor leadership model across two very divergent cultures: the United States and Turkey. In conjunction with the rationalist approach to international management, it was hypothesized that the same range of six leadership styles would appear in both cultures. However, coinciding with the culturalist approach to international management, it was also hypothesized that managers would emphasize different styles in each culture. Turkish and US managers each completed the Leadership Effectiveness Questionnaire measuring degree of emphasis placed on six leadership styles. Results of the test of model invariance indicated that the six styles existed in both cultures; however, discriminant analysis demonstrated that the Autocratic and Consensus styles differentiated managers best. Turkish managers emphasized the Autocratic style to a greater extent and the Consensus style to a lesser extent than did US managers. Implications for international management are discussed. ©1998 John Wiley & Sons, Inc.     

When Paradigms Meet: Interacting Perspectives on Evaluation in the Non‐Profit Sector

This study examines a public debate in Australia, arising from a national government report, around how social contribution in the nonprofit sector should be assessed. Guided by several meta‐perspectives on evaluation, we identify connections between foundational assumptions and normative positions on evaluation espoused by non‐profit organizations (NPOs), and examine the ways in which the inter‐paradigmatic context of the non‐profit sector contributes to the emergence of NPOs’ different normative positions on evaluation. We conclude that particular paradigmatic orientations of NPOs (positivism, interpretivism, constructivism) lead to particular perspectives on how NPOs should engage with alternative paradigms (monism, impartial pluralism, radical pluralism).     

Can Investors Identify Managerial Discretion in Corporate Social Responsibility Practices? The Moderate Role of Investor Protection

This paper analyses investors’ ability to identify if managers use corporate social responsibility as an entrenchment practice to conceal the risk of dismissal associated with managerial discretion and if this detection is determined by the level of investor protection orientation. Results based on an international database of 1949 companies show that investors and markets do not identify managerial entrenchment based on the promotion of sustainable practices, except when such entrenchment is developed by companies located in countries with strong investor protection. In these countries, investors identify and penalise such companies with lower financial performance.