Labour supply in Italy: an empirical analysis of joint household decisions,with taxes and quantity constraints

This study applies an econometric framework which allows for complex non-convex budget sets, highly non-linear labour supply curves and imperfect markets with institutional constraints. A married couple's version of the model is estimated on Italian microdata. The empirical results show that male labour supply is rather inelastic while labour supply among females, especially participation, is considerably more elastic. The elasticities depend strongly on household income. The largest elasticities are found for females living in poor households. The results of the tax simulations suggest that there are only modest labour supply responses from replacing the 1987 system by proportional taxes. Copyright © 1999 John Wiley & Sons, Ltd.     

Methodological challenges in hip fracture registration: the Harstad Injury Registry

The aim of the study was to evaluate a hospital-based injury recording system on hip fracture registration in elderly persons aged?+?65 years from 1994 through 2008, and to examine the agreement between the number of validated fractures and the number of fractures reported to the Norwegian Patient Registry using three different sources: (1) Medical records, (2) Patient administrative system and (3) The hospital's hip fracture record to the Norwegian Patient Registry from 2002 through 2008. The injury recording system included 582 hip fracture events and 535 (92%) were confirmed through the medical records. Reasons for non-verification were different coding failures. Searching the patient administrative system using ICD codes identified 16 hip fractures not included in the fracture registry between 2002 through 2008. The total number was the same as the number of hip fractures reported to the Norwegian Patient Registry using ICD codes alone for identification. The conclusion is that on well-defined diagnosis like hip fractures, local fracture registries may obtain a high degree of reliability if different sources are available for quality control. Well-functioning patient administrative systems may be used to study numbers of hip fractures.     

Dynamic Structure, Exogeneity, Phase Portraits, Growth Paths, and Scale and Substitution Elasticities

The paper studies autonomous dynamic systems that allow for the existence of economic growth per capita without dynamically generating explosive solutions. The implications of any degree of homogeneity, including increasing returns to scale in production, must be carefully examined in two and higher dimensions. The necessity of introducing some exogenous state variables is demonstrated within homogeneous dynamic systems. The authors solve and demonstrate the dynamic implications of scale and the substitution elasticities in various basic (two‐factor) and augmented (multifactor) aggregate growth models.     

Going public: The role of accounting and shareholder value in making sense of an IPO

This study draws on interviews with corporate executives from four companies that went public and financial analysts involved in evaluating these firms. Top managers in all companies became more focused on short-term financial results than they had been when the companies were private. We contribute to existing research by analyzing, empirically and theoretically, the processes producing this focus. Following an IPO process offered a unique insight into a gradual increase in emphasis on accounting metrics through the outcomes of guided and restricted sensemaking. When preparing for the IPO, guided sensemaking produced an IPO prospectus incorporating quantitative and qualitative commitments. Quantitative commitments were based on accounting metrics, such as earnings per share and profit margin, which provided an important foundation for the financial focus. These commitments became the anchor for subsequent sensegiving and restricted sensemaking when the companies were listed. With the financial analysts as the social anchors, the richer communication in the prospectus was narrowed down to comprise an exclusive focus on the quantitative accounting commitments. The long-term accounting commitments in the prospectus were transformed into short-term targets that must be met when the financial measures served as specific and concrete extracted cues to quickly provide structure to the uncertain situation, gain the financial analysts’ confidence and sustain action. One year after the IPO, the financial focus was taken for granted and managers had accepted the rules of the game.     

The research group, the conference programme and academic training in safety promotion - a report of the activities at Karolinska Institutet, Sweden

The research group was established in 1967 at Lund University and moved to Karolinska Institutet in 1980. Work began with epidemiological studies of all injuries in the local community in support of various experimental local interventions. An important element was the creation of 'surveillance systems' in healthcare. The work resulted in the establishment of a WHO Collaborating Centre and an international safety-building programme called 'Safe Communities'. In parallel, training at both master's and doctoral level and the building of a conference programme were embarked upon. The research group consists of three sections. Specific efforts are being made by some countries to address their own injury problems.     

Do firms’ growth rates depend on firm size?

The empirical literature dealing with corporate growth does not in general give support to Gibrat??s Law stating that the expected increase in firm size is proportionate to its initial size, leaving their growth rates independent of size. Using a relatively large and representative sample of approximately 2,500 Danish firms representing all industries, we have evaluated the validity of Gibrat??s Law over the period 1990?C2004. The present analysis addresses this question by applying econometric methods to test Gibrat??s Law and correcting for problems related to autocorrelation. The empirical findings of our study do not generally support Gibrat??s Law, but in contrast to the results of earlier studies, the analysis reveals that firms?? growth rates are more likely to be positively related to firm size.     

The economics of harvesting predator-prey systems

The economics of harvesting a renewable natural resource is well-developed in a framework where environmental conditions of the species looked at are kept constant. For the case of two interacting species as a prey-predator relationship the economics of harvesting one of the two species is analyzed. Questions of existence, uniqueness, and stability are looked at. Applying optimal control theory, a modified golden rule of harvesting is derived.     

Managerial Complexity in Process Industrial R&D Projects: A Swedish Study

Process industries often have features that differ from other businesses, such as round‐the‐clock production and costly and specialized production processes—features that have not been dealt with in the project management literature. We highlight and identify the complexity of R&D projects in the Swedish process industry and its interrelated process development and product development activities based on results from interviews and a case study. The different competence areas in which a project manager must integrate and manage R&D projects is illustrated. We conclude that a project manager needs both production and product‐related competence, including customers' processes.     

Teacher shortages and the business cycle

The ability of the public sector to recruit skilled workers is important for the quality of public sector services. Centralized and rigid pay systems in the public sector might reduce labour supply and lead to shortages of qualified personnel in areas and periods with strong outside labour markets. This paper shows that teacher shortages measured by the share of teachers without approved education are strongly procyclical in Norway. Using a large panel of Norwegian local governments for 1981–2002 and exploiting the rigid wage system, we find a sizeable negative relationship between teacher shortages and the regional unemployment rate.