Towards a decision-support tool for airport slot allocation: Application to Guarulhos (Sao Paulo,Brazil)

In the vast majority of airports where demand exceeds capacity, landing and take-off slots are allocated according to the process established by the Worldwide Slot Guidelines (WSG). An optimization-based decision-support tool is introduced in this paper to assist slot coordinators in the initial slot allocation – the most important stage of that process. The WSG comprises both primary and additional criteria to be taken into account by slot coordinators at this stage. Considering all additional criteria specified in the WSG, this tool generates, in an acceptable amount of time, alternative efficient slot allocations against which the coordinators can evaluate the solutions obtained through the heuristic methods they apply. The decision-support tool also offers solution analysis features, such as visualization, ranking, comparison of multiple optimal solutions, and comparison of solutions regarding important characteristics not reflected in the WSG additional criteria. The tool is being tested at one of the largest airports worldwide – Guarulhos (Sao Paulo, Brazil) – with results that clearly illustrate its usefulness in practice.     

How to survive a pandemic: The corporate resiliency of travel and leisure companies to the COVID-19 outbreak

What protects travel and leisure companies from a global pandemic, such as COVID-19? To answer this question, we investigate data on over 1200 travel and leisure companies in 52 countries. We consider 80 characteristics, such as company financial ratios, macroeconomic variables, and government policy responses. Using regressions and machine learning tools, we demonstrate that firms with low valuations, limited leverage, and high investments have been more immune to the pandemic-induced crash. We also find a beneficial effect of stringent containment and closure policies. Finally, our results indicate that countries with less individualism may be better positioned to cope with the pandemic. Our findings have implications for regulatory bodies, managers, and investors concerning future pandemic outbreaks.     

Efectos de la negociación colectiva e individual en el rendimiento empresarial. Análisis exhaustivo de la incidencia de diversos sistemas de negociación en la productividad laboral

Sobre un conjunto de datos empresariales representativos de todos los Estados miembros de la Unión Europea se analiza la relación entre diferentes procesos y estructuras institucionales de negociación colectiva y la evolución de la productividad laboral. Los resultados muestran efectos de amplio alcance. Algunos procesos y estructuras, en particular los sistemas sin coordinación entre unidades, parecen menoscabar el rendimiento empresarial, mientras que los sistemas coordinados lo mejoran. En consecuencia, lo importante son los procesos y estructuras institucionales en que se inscribe la negociación colectiva y no la cuestión de si la negociación debe ser colectiva o individual.     

Can Optimism be a Remedy for Present Bias?

Under economies with hyperbolic preferences, vast research has investigated welfare‐improving tax policies to resolve capital misallocation issues. In this paper, we suggests an alternative channel to overcome a form of this issue associated with consumer's present bias—optimism, as defined by overexpectation of future productivity. We show that even though optimism negatively impacts consumers under normal circumstances, a moderate level of it can be beneficial when consumers have hyperbolic preferences. On the other hand, pessimism always negatively impacts consumer welfare. A steady‐state analysis shows that the quantitative impact of optimism on welfare can be sizable.     

Does CEO-chairman dialect similarity affect stock price informativeness for Chinese listed firms?

Does CEO-chairman dialect similarity (CCDS) affect stock price informativeness? Based on a sample of Chinese publicly listed firms for the period of 2012–2017, we find that CCDS significantly improves stock price informativeness. Our result implies that CCDS increases the loyalty of managers to their board, and deters them from extracting private benefits, which leads to more informative stock prices. Furthermore, our subsample analyses show that this relationship between CCDS and stock price informativeness is only found in firms that have more media coverage, higher institutional ownership and a non-busy board. Our results also suggest that mutual trust between the CEO and chairman is a possible channel through which CCDS improves stock price informativeness.     

Thailand's Policy Challenges

Thailand's real gross domestic product growth has fallen to a permanently lower trend, making it the worst performer in the Southeastern Asian region. The export sector, the country's long‐standing growth engine, has sputtered due to the declining competitiveness of the manufacturing sector. Chronic political instability during the last two decades has resulted in the adoption of short‐sighted policies, in particular, populist policies designed specifically to garner votes rather than improve the long‐term productivity of the business sector. The military coup was expected to restore political stability and end costly populist policies introduced by elected civil governments. Unfortunately, as the military government develops its long‐term political aspirations, it, too, seeks the assistance of populist policies to ensure its political success. Thailand has promulgated laws and regulations to ensure fiscal discipline, but it has yet to be seen whether the letter of the law can help prevent such populist policies in practice.     

Supplying Slot Machines to the Poor

As gambling becomes increasingly accessible worldwide, governments face an important policy question: how should they exploit the industry's growth to raise tax revenue while protecting individuals from the detrimental effects of gambling? Using data on slot machines from the largest per capita gambling market in the world, Australia, we estimate a structural oligopoly model to (i) quantify firms' incentives to make gambling accessible among socioeconomically disadvantaged groups and (ii) evaluate the effect of government policy (tax levies, supply caps, and venue smoking bans) on the distribution of slot machine supply, tax revenue, and problem gambling prevalence.     

Teachers and politics

I find that self-selection into teacher training programs in Germany is co-determined with ideology. Incoming teacher-trainees are more left-wing in ideology and political preferences than the average incoming university student. I find also that teacher training programs exert a socialization effect: as compared to the average student, teacher trainees’ views are reinforced and they become more left-wing as they progress in their studies. In a third step, I use the German Socio-Economic Panel to compare tenured teachers’ political attitudes with other university graduates and other civil servants, and find that tenured teachers are more left-wing than the average in the respective reference groups. I consider possible explanations for the left-wing orientation of teachers in the German educational system and implications of indoctrination and imbalance of views.     

Wellbeing trajectories around life events in Australia

Wellbeing trajectories around key life events are calculated using HILDA data for Australia. Employing a panel quantile approach, a pan-distributional analysis of these major events identifies distinctive adjustment patterns across the subjective wellbeing distribution and differing orders of magnitudes. For all life aspects analysed, immediate impacts tend to be more acute at the lower end of the wellbeing distribution. The implication of this is that if we are concerned with measuring changes in wellbeing, the point at which we measure these changes is important. Given the increasing importance of wellbeing to broader measures of economic prosperity, these findings touch upon a number of important policy areas. A focus upon social ostracization and a reduction in the persistence of long-term unemployment are all suggested as ways of alleviating the detrimental impact of this important policy variable.     

Public provision of health insurance and aggregate saving in an overlapping generations model with endogenous health risk: The South Korean case

This paper examines the effect of expanding public health insurance in South Korea on medical expenditures and aggregate saving using an overlapping generations model with endogenous health risk. South Korea had a substantial underinsured population, which is aging rapidly. Higher public health insurance benefits reduce individual medical expenditure and health risks but lead to a modest decline in individual and aggregate saving. Even after the expansion, the medical care coverage remains incomplete, and the elderly face a substantial risk of out-of-pocket medical expenditures.