Erik Strøjer Madsen

Appearance of acute PRRS-like symptoms in sow herds after vaccination with a modified live PRRS vaccine

found in the dorsal root ganglia, the ventral horns of the spinal cord or the affected brainstem nuclei. As with other primary dysautonomias, the cause of the dysautonomia in the presented case was not determined. Despite extensive clinical, epizootiological and morphological investigations, mainly on feline and equine dysautonomia, the aetiology of any of these disorders is unknown. A neurotoxic agent is commonly suspected (Pollin and Griffiths 1992).

Measuring wage effects of plant size

Abstract There are large plant size–wage effects in the Nordic countries after taking into account individual and job characteristics as well as systematical sorting of the workers into various plant-sizes. The plant size–wage elasticities we obtain are, in contrast to other dimensions of the wage distribution, comparable to the plant-size effects in other countries such as the U.S. with completely different institutions of wage setting. We also investigate the consequence of measurement error associated with the common practice of using midpoints of plant-size classes to estimate the plant size–wage elasticity. Our results indicate that using size–class midpoints yields essentially the same results as using exact measures of plant size.

The establishment of the danish windmill industry—Was it worthwhile?

The paper examines the welfare effects of the Danish subsidies granted for the electricity production from wind power. This policy has induced a remarkable development of the Danish windmill industry resulting in a dominant position on the world market. The article demonstrates a strong learning-by-doing productivity growth in the Danish windmill industry and it analyzes the costs and benefits of this infant industry case. The costs consist of the efficiency loss from diverting electricity production from using fossil fuels to utilizing wind power. Benefits are the reductions in the environmental damage of using fossil fuels, however, the main benefits are related to the emergence of a new export sector. As the value of the windmill firms at the stock exchange by far exceeds that of the accumulated distorted losses in electricity production, this case demonstrates a successful infant industry strategy. JEL no. D2, L5, L6

Dimensions of the Wage-Unemployment Relationship in the Nordic Countries: Wage Flexibility Without Wage Curves

This paper analyses wage formation in the Nordic countries at the regional level by the use of micro-data. Our results deviate systematically from the main conclusions drawn by Blanchflower and Oswald (1994). We find no stable negative relation between wages and unemployment across regions in the Nordic labor markets once regional fixed effects are accounted for. Wage formation at the regional level is characterized by considerable persistence, but unemployment exerts no immediate influence on wages at the regional level. There is no evidence of a wage curve, nor of a Phillips curve, at the regional level in the Nordic countries. The results are consistent with a theoretical model where central bargaining agents determine a national wage increment, and local bargaining agents determine wage drift.

Evaluation of a blocking Elisa for screening of antibodies against porcine reproductive and respiratory syndrome (PRRS) virus

A blocking Elisa was developed for the detection of antibodies against PRRS virus with a view to satisfying the need for examination of blood samples on a large scale. The test was evaluated in comparison with an indirect Elisa and the immunoperoxidase monolayer assay. The blocking Elisa was sensitive and specific. It had a higher capacity and was cheaper to perform than the immunoperoxidase monolayer assay and the indirect Elisa. It was comparable to the immunoperoxidase monolayer assay and better than the indirect Elisa in detecting antibodies formed early after infection, and it was superior to both the immunoperoxidase monolayer assay and the indirect Elisa in detecting antibodies at a late stage of infection.

Efficiency, R&D and ownership – some empirical evidence

Abstract Investments in R&D create an immaterial capital asset, which is expected to have a positive influence on firms’ efficiency and consequently on their profit. Nonetheless, the short-term effects of current investments in R&D are difficult to prove. Therefore, this paper focuses on analyses based on the technical efficiency methodology using a stochastic frontier approach in order to investigate the influence of R&D activities on the technical efficiency of the firms. Using a sample of 2370 Danish firms, the analysis suggests that R&D-active firms are significantly more efficient than other firms. The legal form of ownership also affects the efficiency significantly, whereas firms owned by large shareholders – who are expected to exert a disciplinary influence on the managers of the firm – do not seem to be more efficient than other firms.

Blocking ELISA's for the distinction between antibodies against European and American strains of porcine reproductive and respiratory syndrome virus.

A double blocking ELISA was developed in order to satisfy the need for large scale serological screening for PRRS and simultaneous distinction between infection with European and American strains of PRRSV in pig herds. The Immunoperoxidase monolayer assay (IPMA) and the double blocking ELISA enabled distinction on serological basis between infection with European and American strains of PRRSV. The distinction was possible from about day 7 after infection of pigs with PRRSV. The double blocking ELISA enabled the distinction at later stages of infection compared to the IPMA, irrespective of the strain involved.

R&D and productivity in Danish firms: some empirical evidence

The aim of the paper is to examine the relationship between R&D capital and productivity using microdata for Danish manufacturing firms. The influence of factors such as ownership, innovative characteristics and source of funding accounted for. The return to accumulated R&D capital is estimated to be in the neighbourhood of 9–12%, whereas the short-run effect of R&D is insignificant. Furthermore, the direct influence from foreign ownership, source of funding accounted for, innovative characteristics and ownership dispersion on productivity are analysed. However, none of the factors seem to have an impact on firm productivity. The same is the case for the indirect influence coming from interaction with accumulated R&D capital.

Scale in technology and learning-by-doing in the windmill industry

This paper examines the remarkable development of technology and the fast learning-by-doing in the windmill industry since it emerged in the beginning of the 1980s. Based on time series of prices of windmills a dynamic cost function for producing windmills is tested. The estimations verified that learning-by-doing in the Danish windmill industry has contributed significantly to improve the cost efficiency of the producers. The technological development has been stimulated both by process and product innovations as the capacity of the individual mills has increased. The learning effect created by early subsidies from the government has consolidated the competitive advantages of the windmill cluster in Denmark and preserved the first mover advantages at the world market. The article concludes that the industry probably will enter into a matured phase in the future with more modest technological growth.

Marketing and Globalization of the Brewing Industry

Many analyzes have been made of globalization in the brewing industry that occurred at the start of the 21st century in which mergers and acquisitions (MA Pedersen et al., 2013). But the motivations of the key players behind globalization in the beer market remain unclear. The largest breweries played the key role in the restructuring of the industry and doubled their share of the world beer market, but seemingly without any short-term payoffs (Madsen et al., 2012). In this chapter we focus on the nature of the product and discuss the methods of distribution and product branding as important explanations why the brewing industry moved from a regional to a global industry.