German Emigration and Remigration Panel Study (GERPS): Documentation of the Second Wave

International migration originating from highly developed countries is a crucial component of global migration flows. There are, however, surprisingly little data about the international mobility of the populations of affluent countries. The German Emigration and Remigration Panel Study (GERPS) aims to provide a resource that enables the analysis of individual consequences of international migration as well as the socio-structural consequences for the country of origin. GERPS is based on an origin-based multistage probability sample using the German population registers as a sampling frame. The second wave yields a net sample of roughly 7,000 persons who recently moved abroad from Germany and persons who returned from Germany after having lived abroad. The study follows a multidestination-country-design and enables the comparative analysis of migrants and nonmigrants, who stayed in the country of origin. GERPS is a panel study with at least four waves during a period of at least 24 months. This documentation presents the methods and data of the second wave. It provides information for researchers and invites them to use the new data infrastructure for their own research

German Emigration and Remigration Panel Study (GERPS): Methodology and Data Manual of the Baseline Survey (Wave 1)

International migration between economically highly developed countries is a central component of global migration flows. Still, surprisingly little is known about the international mobility of the populations of these affluent societies. The aim of the German Emigration and Remigration Panel Study (GERPS) is to collect data to analyse the individual consequences of international migration as well as the consequences for the country of origin. GERPS is based on an origin-based multistage probability sample using the German population registers as a sampling frame. The realised net sample includes more than 11,000 persons who recently moved abroad from Germany and persons returning to Germany after having lived abroad. The study follows a multi-destination country design and allows comparative analyses of migrants and non-migrants who stayed in the country of origin. GERPS is a panel study with at least four waves during a period of at least 24 months. This documentation, however, presents the methodology and the data for the first wave providing the baseline survey. Detailed information is provided to invite external researchers to apply the new data infrastructure to their own research and to disseminate the innovative research design to construct migrant samples

German Emigration and Remigration Panel Study (GERPS): Methodology and Data Manual of the Baseline Survey (Wave 1)

International migration between economically highly developed countries is a central component of global migration flows. Still, surprisingly little is known about the international mobility of the populations of these affluent societies. The aim of the German Emigration and Remigration Panel Study (GERPS) is to collect data to analyse the individual consequences of international migration as well as the consequences for the country of origin. GERPS is based on an origin-based multistage probability sample using the German population registers as a sampling frame. The realised net sample includes more than 11,000 persons who recently moved abroad from Germany and persons returning to Germany after having lived abroad. The study follows a multi-destination country design and allows comparative analyses of migrants and non-migrants who stayed in the country of origin. GERPS is a panel study with at least four waves during a period of at least 24 months. This documentation, however, presents the methodology and the data for the first wave providing the baseline survey. Detailed information is provided to invite external researchers to apply the new data infrastructure to their own research and to disseminate the innovative research design to construct migrant samples

Economical impacts of alternatives to the castration of piglets without anaesthesia

The current practise of castrating piglets must be replaced by 2009. The economic viability of four alternative methods was examined: Rearing entire boars, vaccination against boar taint, anaesthesia by inhalation and anaesthesia by injection. The method used was a modified schema for the calculation of the gross margin in pig fattening. All economic affects, upstream and downstream the value chain, were integrated into the gross margin for pig fattening. All alternative methods led to a decrease of the gross margin. The reduction was moderate (2.30 to 3.70 SFr) with the vaccination against boar taint, with anaesthesia by inhalation in major and medium farms and with anaesthesia by injection. For small breeding farms, the gross margin was reduced by up to 10 SFr, mainly due to the high depreciation of the anaesthesia equipment. For these farms the question whether it will be feasible that several farms may commonly use one set of anaesthesia equipment is paramount. The costs of anaesthesia by injection are mainly determined by the price of the anaesthetic drug, thus there is no cost degression with increasing operation size. However, the price of the anaesthetic drug can, to this date, merely be estimated, as the product is not yet available on the market. The lower feed costs that are associated with the vaccination against boar taint cannot completely compensate for the cost of the vaccination drug and the expenses of two vaccinations. The increased percentage of lean meat of vaccinated boars can considerably influence their profitability. However, as the quality payment scheme in Switzerland is nonlinear, the aspects of carcass composition could not be incorporated into the comparison. The topic is picked up in annex 1. Fattening entire boars shows clear cost advantages (feed conversion, no costs for castration). However, the poor returns of carcasses affected by boar taint impact the profitability considerably. With a share of affected carcasses of 2.5%, the gross margin increases (marginally) by SFr. 0.10. However, with a share of 5% or 10% respectively, it decreases by SFr. 6.30 or 19.00, respectively. In the trials that have been conducted hitherto the share clearly exceeded 5%. As long as the part of tainted carcasses cannot be considerably decreased or as long as there is no better valorisation available for carcasses affected by boar taint, fattening of entire boars is not economically viable (exception: niche markets). The costs implied with the use of the electronic nose were estimated as a part of the calculation of the viability of fattening entire males. In major and medium slaughterhouses, the electronic nose can be used with moderate costs (up to SFr. 3.00/analysis). In medium slaughterhouses, however, this is only the case if the time that the carcasses are left to mature can be used for the analysis (no analysis in parallel to the slaughtering process). At the artisan slaughterer’s level, the electronic nose cannot be used in an economically viable way

German Emigration and Remigration Panel Study (GERPS): Documentation of the Third Wave

International migration originating from highly developed countries is a crucial component of global migration flows. There are, however, surprisingly little data about the international mobility of the populations of affluent countries. The German Emigration and Remigration Panel Study (GERPS) aims to provide a resource that enables the analysis of individual consequences of international migration as well as the socio-structural consequences for the country of origin. GERPS is based on an origin-based multistage probability sample using the German population registers as a sampling frame. The third wave yields a net sample of roughly 5,800 persons who recently moved abroad from Germany and persons who returned from Germany after having lived abroad. The study applies a multidestination-country-design and enables the comparative analysis of migrants and individuals who stayed in the country of origin. GERPS is a panel study with five waves covering a period of 36 months. This documentation presents the methods and data of the third wave of the panel. It provides information for researchers and invites them to use the new data infrastructure for their own research