A general formula for the normal mean errors of the coefficients in parabolic least squares graduation

Abstract

A set of observations contains N elements, and the two measures x and y are observed for each element. Searching the ? best value ? of y as dependent on x, we put      

The value of commuting time in an empirical on-the-job search model – an application based on moments from two samples

This article estimates the Value of Commuting Time (VOCT) among Swedish males in an empirical on-the-job search model. It uses a large sample of employee-establishment linked data obtained from administrative registers. The sample lacks information on mode choice for the journey to work. We therefore estimate a mode choice model on another sample and use this model to link the administrative data to the relevant set of travel times, costs and distances. The VOCT is found to be 1.8 times the net hourly wage rate in the sample. The relatively high estimate results from a high VOCT among cohabiting men.     

Infrastructural change and secular economic development

Long-term economic development is determined by changes to the infrastructure, especially material and non-material infrastructural networks that link agents in different locations. The infrastructure consists of the slowly changing, collective arena that supports production, exchange, and consumption, such as the built environment, transport networks, and institutions. In the short run the infrastructure can be regarded as fixed. Changes to the infrastructure are under normal conditions small enough to be disregarded by producers and consumers. With the creation of a critical link of a network, there will however be a revolutionary restructuring of the arena. Critical links are here defined as additions to infrastructural networks that create opportunities for new information and transport flows between previously unconnected regions. Such a revolutionary restructuring of infrastructural networks has been called a logistical revolution. Certain institutional pre-conditions are necessary for a logistical revolution, while the creation of a critical link is both a necessary and a sufficient condition. This paper discusses the three logistical revolutions that occurred in the 13th century, around 1600, and in the 19th century, which each had crucial similarities with the current “information revolution.”     

Attitudinal loyalty and trust in entrepreneurship: building new relationships

This paper studies the impact of attitudinal loyalty and trust in entrepreneurship, following a client-focused strategy. In this context, trust and commitment are the cornerstone of relationship marketing, and contributes positively to achieving attitudinal loyalty, which is suitable for the maintenance of relationships over time. This variable also acts as a facilitator or mediator on the influence satisfaction has on loyalty. We show that satisfaction has a positive impact on trust and attitudinal loyalty. Following structural equation modelling methodology we test all the relationships in a sample composed by travel agency customers.     

Are Gay Men and Lesbians Discriminated against in the Hiring Process?

This article presents the first field experiment on sexual orientation discrimination in the hiring process in the Swedish labor market. Job applications were sent to about 4000 employers in 10 different occupations in Sweden. Gender and sexual orientation were randomly assigned to applications. The results show that sexual orientation discrimination exists in the Swedish labor market. The discrimination against the gay male applicant and the lesbian applicant varied across different occupations and appears to be concentrated in the private sector. The results also show that the gay male applicant was discriminated against in typical male‐dominated occupations, whereas the lesbian applicant was discriminated against in typical female‐dominated occupations. Theoretical implications are discussed.     

Adverse selection and bilateral asymmetric information

A simple principal-agent model with bilateral asymmetric information and common values is developed. The agent(s) has private information about his characteristics but does not knowhow these affect outcomes. The principal knows how the characteristics translate into outcomes, but does not observe the characteristics. It is shown that equilibrium contracts aresimple in being designednot to reveal the agent's characteristics. When the agent knows howsome of his characteristics affect the outcome, contracts will be differentiated with respect to precisely those characteristics. An application to the use of genetic information is considered.     

Managing policy lapse risk in Sweden’s life insurance market between 1915 and 1947

Abstract

We examine the challenges that Swedish life insurers faced in managing the lapse risk of policies written on the lives of the industrial urban working class between 1915 and 1947. We observe that with the threat of State socialisation of insurance in the 1930s, industrial life insurers modified their business practices to better control policy lapses. Using firm-level data, we also analyse the effect of socio-economic changes, such as rising real wages, interest rate fluctuations and unemployment on life insurance policy lapses. Our results support contemporary tests of the emergency fund and interest rate explanations for the voluntary premature termination of life insurance policies.     

An extension of Mohring's model for land rent distribution

In an early paper Herbert Mohring (J. Pol. Econ., 49 (1961)) presented a model for land rent distribution yielding the well-known result that the price of land must fall with the distance from the city center to offset transportation costs. Our paper is an extension of Mohring's model in which we relax some of his drastic simplifying assumptions. This extended model has been incorporated in a method for economic evaluation of city master plans which has been applied to a Swedish city. In this method the interdependence among housing, heating, and transportation, the durability of urban structures, and the uncertainty of future demand are explicitly considered within a cost-benefit approach. Some empirical results from this pilot study concerning land rent distributions are also presented here.     

On the screening power of incentive schemes

We demonstrate the screening power of incentive schemes. The model is a synthesis of a signaling model and the principal-agent problem. A non-cooperative stage where the agent may send a signal precedes a contractual stage where the agent serves a principal under an incentive scheme. After establishing the existence of a revealing equilibrium in an environment with long-lived principals and overlapping contracts, the paper discusses the implications for efficiency of the distribution of surplus. Finally, it is shown that under commitment the agency relationship may serve self-selection purposes and hence reduce the need of costly signaling.     

Assessing the impact of nocturia on health-related quality-of-life and utility: results of an observational survey in adults

Background and aim: The impact of nocturia (getting up at night to void) on health-related quality-of-life (HRQoL) is often under-estimated. This study investigated the relative burden in terms of HRQoL and utilities of nocturia in a real-world setting.

Methods: Patient data were collected from two surveys: a nocturia-specific, cross-sectional survey of physicians and their patients (DSP), and a general UK population health survey (HSFE). Utilities (EQ-5D-5L), productivity (Work Productivity and Activity Index), and the impact of nocturia symptoms (Nocturia Impact Diary and Overactive Bladder Questionnaires) were assessed against the number of voids. A robust linear regression model with propensity score weights was used to control for confounding factors in estimating utilities.

Results: Physician-recorded data were available from 8,738 patients across the US, Germany, Spain, France, and the UK; of these, 5,335 (61%) included patient-reported outcomes. In total, 6,302 controls were drawn from the two surveys and compared to 1,104 nocturia patients. Deterioration of HRQoL was associated with increasing number of night-time voids (p?p?p?Limitations: The cause of nocturia is multifactorial and the mostly elderly patients may have several concomitant diseases. The authors tried to adjust for the most common ones, but there may be diseases or unknown relationships not included.

Conclusions: Nocturia negatively affected HRQoL and patient utility. A clear effect is seen already at two voids per night. Every effort should, therefore, be made to reduce nocturia below the bother threshold of two voids per night.