Multi-equation modelling of desirable and undesirable outputs satisfying the materials balance

The key feature when modelling joint production of intended outputs and unintended residuals is that the latter stem from the use of material inputs. A multi-equation model building on the factorially determined multi-output model of classical production theory satisfies the materials balance that tells us that the mass contained in inputs cannot disappear, but must turn up in the desirable outputs or end up as residuals. In this model, potentially complex technical relationships are simplified to express each of the intended outputs and the residuals as functions of the same set of inputs. Serious problems with the single-equation models most often found in the literature are demonstrated. Abatement activity in the form of end of pipe is added, and an optimal planning solution is derived using the concept of an environmental damage function for the impact of discharge of residuals into the natural environment. It is shown that the traditional environmental policy instruments, like direct regulation restricting the amount of undesirable residuals discharged to the environment, a Pigou tax on pollutants, and cap and trade, all function well. Extending the multi-equation model to allow for inefficiency, three efficiency measures are introduced: desirable output efficiency, residuals efficiency, and abatement efficiency. It is conjectured that these measures can be estimated independently using the DEA model.     

Local labor markets and earnings of refugee immigrants

This paper estimates how local conditions at the time of immigration influence later outcomes for refugee immigrants to Norway, exploiting the quasi-experimental nature of the Norwegian system for settlement for “quota” or resettlement refugees. A unique administrative dataset with assigned settlement municipalities is used to identify the causal effect of initial location characteristics. Being placed in a labor market where other non-OECD immigrants do well increases own annual labor earnings up to 6 years after immigration. Extended models suggest that this effect is not driven by individual scarring effects: when controlling for the contemporaneous employment rate in the assigned region, effects of initial conditions disappear. Rather, the effects appear to be due to persistence in local labor market conditions combined with limited geographical mobility in response to adverse labor market conditions.     

Dominated choices in a simple game with large stakes

This paper examines data from the Norwegian television game show Joker, where contestants make well-specified choices under risk. The game involves very large stakes, randomly drawn contestants, and ample opportunities for learning. Central models of risk choice, including expected utility theory, give a simple prediction of choice under weak conditions, as one decision is always first-order stochastically dominating. We document frequent, systematic and costly violations of dominance. Many contestants appear to have a systematic expectation bias that can be related to Tversky and Kahneman’s (Cogn. Psychol. 5(2):207–232, 1973) “availability heuristic”. In addition, contestants seem to make systematic calculation errors that are well captured by the so-called Fechner model.     

Ad valorem versus unit taxes: monopolistic competition, heterogeneous firms, and intra-industry reallocations

Real-world industries are composed from heterogeneous firms and substantial intra-industry reallocations take place, i.e. high productivity firms squeeze out low productivity firms. Previous tax-tool comparisons have not included these central forces of industry structure. This paper examines a general equilibrium monopolistic competition model with heterogeneous firms and intra-industry reallocations. We show that the welfare superiority of ad valorem over unit taxes under imperfect competition is not only preserved but amplified. The additional difference between the tools arises because unit taxes distort relative prices, which in turn reduces average industry productivity through reallocations (the survival and increased market share of lower productivity firms). Importantly, numerical solutions of the model reveal that the relative welfare loss from using the unit tax increases dramatically in the degree of firm heterogeneity.     

Tourism stakeholders’ perceptions of national park management in Norway

Local tourism firms represent an important stakeholder interest in national parks. The present study examines these stakeholders’ perceptions of management processes and their assessments of the resulting management plans and operations. This research is based on qualitative interviews with representatives of tourism businesses in two different national park settings in Norway – Rondane National Park and Jotunheimen National Park. The findings illustrate that despite their general support for the national park status, the local tourism stakeholders interviewed had experienced only minor involvement in the management planning process, and had had very little influence in the final management decisions. They believed that opportunities for business operations were lacking due to excessive management restrictions, and that managers lacked competence with regard to business management and tourism development issues. In addition, they thought that management authorities should more explicitly include sustainable tourism development in their visions and goals. Based on the findings, it is assumed that there is potential for local tourism operators to take greater responsibility in planning processes and management operations. It is concluded that measures should be taken to foster durable social links and trustworthy planning partnerships between responsible managers and local tourism stakeholders in the two national parks.     

Hedging Equity-Linked Life Insurance Contracts

Abstract

This paper examines a portfolio of equity-linked life insurance contracts and determines risk-minimizing hedging strategies within a discrete-time setup. As a principal example, I consider the Cox-Ross-Rubinstein model and an equity-linked pure endowment contract under which the policyholder receives max(S_T , K) at time T if he or she is then alive, where S_T is the value of a stock index at the term T of the contract and K is a guarantee stipulated by the contract. In contrast to most of the existing literature, I view the contracts as contingent claims in an incomplete model and discuss the problem of choosing an optimality criterion for hedging strategies. The subsequent analysis leads to a comparison of the risk (measured by the variance of the insurer’s loss) inherent in equity-linked contracts in the two situations where the insurer applies the risk-minimizing strategy and the insurer does not hedge. The paper includes numerical results that can be used to quantify the effect of hedging and describe how this effect varies with the size of the insurance portfolio and assumptions concerning the mortality.     

Lognormal Approximation of Complex Path-Dependent Pension Scheme Payoffs

Abstract

This paper analyzes an explicit return smoothing mechanism which has recently been introduced as part of a new type of pension savings contract that has been offered by Danish life insurers. We establish the payoff function implied by the return smoothing mechanism and show that its probabilistic properties are accurately approximated by a suitably adapted lognormal distribution. The quality of the lognormal approximation is explored via a range of simulation-based numerical experiments, and we point to several other potential practical applications of the paper's theoretical results.     

Risk as feelings or risk and feelings? A cross‐lagged panel analysis

This article focuses on affective and cognitive processes underlying the perception of risk. A limitation with most process models of affect/cognition is that they include only concurrent emotions. By following a group (n?=?129) of military sailors prospectively during an international operation, we explored longitudinal relations between perceived risk and related feelings.

Longitudinal cross‐lagged path models were estimated to explore the relationships between perceived risk, worry, and emotional distress. Results gave support to earlier studies by showing that cross‐sectional measures of risk and worry were weakly related. Across time, worry and emotional distress were reciprocally related. Perceived risk had impact on worry but not on emotional distress. Neither worry nor emotional distress influenced perceived risk.

The risk‐as‐feelings hypothesis postulates a direct effect of feelings onto behavioural choice, and a reciprocal relation between cognitive evaluations and feelings.

Our findings do not support a reciprocal relation between judgements of risk and feelings, but an impact from risk on to worry. Between various measures of feelings reciprocity seems to exist. Further replications, including also behavioural measures, are needed.     

Safety attitudes,behaviour, anxiety and perceived control among professional and non-professional drivers

The current study aimed to investigate differences in psychological safety factors such as attitudes and behaviour among professional and non-professional drivers. Differences in accident involvement and the number of speeding tickets were also investigated. An additional aim was to study factors associated with risky driver behaviour and speeding tickets in these groups. A questionnaire survey was distributed by mail to a randomly selected sample from the Norwegian population registry (N?=?6203). The response rate was 30% and the final sample consisted of 1864 individuals. Adjusted for demographic characteristics and road traffic exposure the results showed that professional drivers (n?=?113) reported significantly less seat belt use and watchful driving than non-professional drivers (n?=?1594). Professional drivers reported significantly less fun riding and safer attitudes regarding addressing the unsafe driving of others. The professional drivers also reported significantly safer behaviour related to drink driving, but lower priorities of road traffic safety. Professional drivers perceived significantly more control and had been involved in more accidents than the non-professional drivers. The results suggest that professional drivers may constitute a risk group in road traffic. Further research could focus on barriers of seat belt use and mechanisms, which could promote safety priorities in this driver group. The knowledge gained by such studies could be utilised by company managers in order to promote safer behaviour among professional drivers.     

Predictive safety analytics: inferring aviation accident shaping factors and causation

This paper illustrates the development of an object-oriented Bayesian network (OOBN) to integrate the safety risks contributing to an in-flight loss-of-control aviation accident. With the creation of a probabilistic model, inferences about changes to the states of the accident shaping or causal factors can be drawn quantitatively. These predictive safety inferences derive from qualitative reasoning to conclusions based on data, assumptions, and/or premises, and enable an analyst to identify the most prominent causal factors leading to a risk factor prioritization. Such an approach facilitates a mitigation portfolio study and assessment. The model also facilitates the computation of sensitivity values based on perturbations to the estimates in the conditional probability tables. Such computations lead to identifying the most sensitive causal factors with respect to an accident probability. This approach may lead to vulnerability discovery of emerging causal factors for which mitigations do not yet exist that then informs possible future R&D efforts. To illustrate the benefits of an OOBN in a large and complex aviation accident model, the in-flight loss-of-control accident framework model is presented.