Esscher transforms and the minimal entropy martingale measure for exponential Lévy models

In this paper we offer a systematic survey and comparison of the Esscher martingale transform for linear processes, the Esscher martingale transform for exponential processes, and the minimal entropy martingale measure for exponential Lévy models, and present some new results in order to give a complete characterization of those classes of measures. We illustrate the results with several concrete examples in detail.     

Transitions in the stock markets of the US,UK and Germany

In an analysis of the US, the UK and German stock market, we find a change in the behaviour based on the stocks’ beta values. In the years 1995–2006, trades of stocks with high beta and large volume were concentrated in the IT and technology sector, whereas in 2006–2012 those trades are dominated by stocks from the financial sector. We show that an agent-based model can reproduce such a transition. We further show that the initial impulse for the transition might stem from the increase of high-frequency trading at that time.     

Institutions of conflict management and economic growth revisited: a short note

We study the effects of institutions of conflict management like corporatism, trust, civic norms and group membership on economic growth. By employing Schneider and Wagner’s (Kyklos 54:509–532, 2001) model and data from 1990–2011, we show that corporatism has (still) a positive coordination effect and a negative rent-seeking effect. The total effect is positive for most countries.     

Health Care Reform: Separating Insurance from Income Redistribution

Most systems of health care financing in EU member states currentlyinclude elements of income redistribution. The paper analyzesthe effects of shifting this kind of redistribution to the taxsystem and argues that this reform could create two types ofefficiency gains. On the expenditure side, it would facilitatethe adoption of more incentive-compatible insurance contracts,for example through the introduction of copayment schemes. Onthe revenue side, income redistribution through the general taxsystem is likely to imply a shadow price of public funds thatis lower than if redistribution is carried out through wage-basedinsurance contributions.     

New COVID-related results for estimating the shadow economy in the global economy in 2021 and 2022

International Economics and Economic Policy - Considering the development of the shadow economy of 36 European and OECD countries over the period from 2003 to 2022 and the effect of the Coronavirus...     

Next-generation entrepreneurial identity in family business systems: The influence of role-changing events on the understanding of legacy,individual identity,and transgenerational entrepreneurship of next-generation family business principals

The paper addresses how the understanding of family business legacy, individual identity, and transgenerational entrepreneurship of next-generation principals is affected by role changing events in family business systems. The paper uses the insights of a focus group of 38 next-generation family business principals of ultrahigh-net-worth business families from 14 countries. It corroborates that parents and role models are influencing factors on the understanding and perception of family identity, values, and transgenerational entrepreneurship. Identity inflection points during moments of expected and unexpected role changes, such as family business succession, can either positively or negatively impact the appreciation of a next-generation principal regarding legacy, identity, and transgenerational entrepreneurship. Based on the results of the qualitative interviews and peer group discussions, the findings indicate how identity inflection points affect the preservation of the next-generation family business principal's identity and family identity during a moments of role changes in family businesses and are a bottleneck for transgenerational entrepreneurship.