Enhanced policy iteration for American options via scenario selection

Kolodko and Schoenmakers (2006 Kolodko, A and Schoenmakers, J. 2006. Iterative construction of the optimal Bermudan stopping time. Finan. Stochast., 10: 27–49. [Crossref], [Web of Science ®] , [Google Scholar]) and Bender and Schoenmakers (2006 Bender, C, Kolodko, A and Schoenmakers, J. 2006. Iterating cancelable snowballs and related exotics in a many-factor Libor model. Risk, September: 126–130.  [Google Scholar]) introduced a policy iteration that allows the achievement of a tight lower approximations of the price for early exercise options via a nested Monte Carlo simulation in a Markovian setting. In this paper we enhance the algorithm by a scenario selection method. It is demonstrated by numerical examples that the scenario selection can significantly reduce the number of inner simulations actually performed, and thus can greatly speed up the method (by up to a factor of 15 in some examples). Moreover, it is shown that the modified algorithm retains the desirable properties of the original, such as the monotone improvement property, termination after a finite number of iteration steps, and numerical stability.     

Jumping over a low hurdle: personal pension fund performance

This paper provides a comprehensive analysis of the annual and of the long-term performance of personal pension funds relative to their Primary Prospectus Benchmarks (PPBs) and T-bills. The study covers 9659 personal pension funds from across all 30 ABI investment sectors that operated in the UK in the 1980–2009 period. Of these, 4531 pension funds are compared against their PPBs. The performance measured by ordinary excess returns over the UK T-bills and over PPBs, as well as the Sharpe ratio, Sharpe ratio adjusted for skewness and kurtosis, Sortino ratio in relation to the UK T-bills and PPBs, and the Modigliani–Modigliani measure are calculated for arithmetic, geometric and log returns. We find convincing evidence that pension funds lack challenging long-term performance targets. We argue that the existing PPBs are easy to outperform given that funds are allowed to diversify in assets not included in their PPBs. We discuss policy implications of our findings.     

An Empirical Examination of Stakeholder Groups as Monitoring Sources in Corporate Governance

Insurers are formally and informally monitored by a variety of stakeholders, including reinsurers, agents, outside board members, and regulators. While other studies have generally examined these stakeholders separately, they have not accounted for the fact that there is some relation among the stakeholder groups, and the presence of these groups is likely to be jointly determined. By empirically controlling for these potential interrelations, we create a more complete assessment of the impact of these stakeholders/monitors on insurers’ risk taking. Specifically, we find that the presence of some stakeholders offsets the degree or presence of others, and that most stakeholders/monitors are associated with a reduction of overall firm risk.     

Specification tests and tests for overidentifying restrictions in panel data models with selection

Standard tests are generally not applicable in panel data models with selection. The paper shows how the Hausman specification test and the Sargan-Hansen test for overidentifying restrictions can be generalized to panel data models with unobserved heterogeneity and sample selection.     

Sabotage in the financial system: Lessons from Veblen

The global financial crisis that started in the summer of 2007 has generated a wide-ranging discussion about the causes of the meltdown and the role of banking and bankers in today's economy. However, the ongoing debate rarely addresses questions of business tactics in the financial industry. Indeed, while ‘incentives,’ ‘vested interests,’ power, and—increasingly—social utility are often factored into analyses of financial regulation, the strategies and tactics of financial institutions are rarely discussed in a systematic way in academic and policy debate. Nonetheless, we believe that these two elements are key to understanding the financial system, not as a mere sector of the wider economy but as a business enterprise driven by its own logic and shaped by a variety of business tactics of its key agents. In our vision of finance as business, we draw on the concept of industrial sabotage as a business tactic (originally developed by Thorstein Veblen) to explore the roots of the financial sector's contemporary architecture. Our key premise is that the central motive driving the process often described as ‘financialization’ or financial innovation is the sabotage instinct of finance operating as business. Whereas Veblen originally understood sabotage as “conscientious withdrawal of efficiency,” today, we argue, the workings of the banking and financial sector augment the very notion of efficiency by relying on concepts, techniques, and institutions of financial innovation that are shrouded in complexity. In this article, we explore conceptual, institutional, and selected policy dimensions of this phenomenon.     

Insights from the mandatory insurer climate risk disclosure survey in the United States

We document the implementation of the Insurer Climate Risk Disclosure Survey in the United States and provide an overview of its historical development since 2009. By 2020, the Survey is mandatory in 15 states or jurisdictions for insurers that meet the premium threshold. We find that the coverage of the Survey has reached 80% of Property & Liability premiums and close to 100% of life premiums, but the majority of US insurers—especially small or less diversified insurers who are most vulnerable to climate risk—are not covered by this survey. We highlight research opportunities exploiting the unique institutional setting of the Survey while also documenting the caveats of the Survey.     

Sibling rivalry: implications for the family business succession process

This paper deals with sibling rivalry dynamics and their impact on the succession outcome within family enterprises. While sibling rivalry plays a critical role in the succession process, there is only limited literature that addresses this important subject. This theoretical study reveals valuable insights on this topic and contributes to the existing literature. Particular attention is placed on parental behavior and attitude during childhood, sibling characteristics and the perception of parental fairness by the successors, which we advocate are the principal factors conducive not only to the emergence of rivalry among heirs but also to influencing the effectiveness of the succession outcome.     

Binary response panel data models with sample selection and self‐selection

We consider estimating binary response models on an unbalanced panel, where the outcome of the dependent variable may be missing due to nonrandom selection, or there is self‐selection into a treatment. In the present paper, we first consider estimation of sample selection models and treatment effects using a fully parametric approach, where the error distribution is assumed to be normal in both primary and selection equations. Arbitrary time dependence in errors is permitted. Estimation of both coefficients and partial effects, as well as tests for selection bias, are discussed. Furthermore, we consider a semiparametric estimator of binary response panel data models with sample selection that is robust to a variety of error distributions. The estimator employs a control function approach to account for endogenous selection and permits consistent estimation of scaled coefficients and relative effects.     

Facebook Content Strategies and Citizens’ Online Engagement: The Case of Greek Local Governments

This paper analyzes the communication strategies used by Greek local governments through the utilization of Web 2.0 technologies, specifically Facebook, and the effectiveness of these strategies in relation to citizens’ online engagement. More specifically, it examines Facebook communication strategies and levels of citizens’ engagement. For this purpose, we conducted a content analysis on the active and official Facebook pages of local municipalities in Greece from January 2017 until the end of September 2017. Our results suggest a rise in the percentage of active Facebook pages maintained by local governments in comparison to our 2014 study. Our results also show that local governments in Greece are using Facebook in a predominantly top-down manner to promote events organized by the municipality and to push one-way information to citizens about their services and actions. Local authorities have, however, made significant progress in relation to posts that support transparency and accountability and that enhance or mobilize citizens’ participation. Our evaluation of local government Facebook strategies indicates that marketing the municipality to external public, such as tourists, and providing information about services are effective strategies that drive citizens’ online attitude expression (liking), engagement (commenting), and advocacy behavior (sharing). According to our analysis, local governments in Greece prefer the strategies that we found to be the least engaging. In addition, our study provides interesting details of how specific characteristics and modes of Facebook messages (photos, videos, URLs, hashtags, and mentions) impact on citizens’ engagement. Finally, our results provide valuable insights for social media managers in local government who aim to increase the impact of their municipal Facebook pages.     

Information effect of entry into credit ratings market: The case of insurers' ratings

The paper analyzes the effect of competition between credit rating agencies (CRAs) on the information content of ratings. We show that a monopolistic CRA pools sellers into multiple rating classes and has partial market coverage. This provides an opportunity for market entry. The entrant designs a rating scale distinct from that of the incumbent. It targets higher-than-average companies in each rating grade of the incumbent's rating scale and employs more stringent rating standards. We use Standard and Poor's (S&P) entry into the market for insurance ratings previously covered by a monopolist, A.M. Best, to empirically test the impact of entry on the information content of ratings. The empirical analysis reveals that S&P required higher standards to assign a rating similar to the one assigned by A.M. Best and that higher-than-average quality insurers in each rating category of A.M. Best chose to receive a second rating from S&P.