Greek meat supply response and price volatility in a rational expectations framework: A multivariate GARCH approach

This paper examines supply response models in a rational expectations framework for each one of the four major Greek meat markets, i.e. beef, broiler, lamb and pork. A multivariate GARCH model with Cholesky decomposition is used to incorporate price volatility into the rational expectations supply response model for each meat category and as a result the conditional covariance matrix remains positive definite without imposing any restrictions on the parameters. The empirical results confirm the existence of rational behaviour by meat producers in the four examined markets and indicate that price volatility is a major risk factor in Greek meat production while feed prices and veterinarian medicine prices are both important cost factors. Furthermore, the last Common Agricultural Policy reform is found to have a negative impact on the beef and lamb production in Greece.meat supply, price volatility, rational expectations, MGARCH., Agricultural and Food Policy,

Nanoscale Impurity Structures on the Surface of dx2−y2d_{x^2-y^2}-wave Superconductors

We study the effects of nanoscale impurity structures on the local electronic structure of $d_{x^2-y^2}$-wave superconductors. We show that the interplay between the momentum dependence of the superconducting gap, the geometry of the nanostructure and its orientation gives rise to a series of interesting quantum effects. Among these are the emergence of a zero bias conductance peak in the superconductor's density of states and the suppression of impurity states for certain nanostructures. The latter effect can be used to screen impurity resonances in the superconducting state.Comment: 4 pages, 5 figure

Urban circular policies and employment through FDI

This paper examines the association between circular strategies imposed by European cities on the attraction of greenfield foreign direct investment (FDI) and the creation of circular gross employment through greenfield FDI. We utilize a recently developed database of circular strategies employed by local authorities in 43 European cities with information on greenfield FDI in these cities and other city characteristics for the years 2016–2017. We find that urban circular policies are positively and significantly associated with the attraction of greenfield FDI–generated employment, where the effect is stronger for regulatory and economic instruments compared to soft instruments

Studies on table grape germplasm grown in Northern Greece. 2. Seedlessness, berry and must characteristics

From 1991 to 1993 nine quantitative and qualitative characteristics of the grape berry and its must were evaluated using local and introduced table grape cultivars of the grapevine collection of the Greek Gene Bank. The data indicate a distinct variation in the grape germplasm in all characters and demonstrate the usefulness of the genetic material as a donor of important genes for grapevine improvement. Principal Component Analysis (PCA) produced 2 factors representing 68.1% of the total variation. PC1, explaining 43.6% of the total variance, is highly correlated with berry size parameters and characteristics of the berry structure. By Cluster Analysis the assessed cultivars were separated into distinct groups; while seedlessness, was associated with small berry detachment force from the pedicel, late maturity was combined with high acid and low sugar content and a large number of seeds per berry was accompanied by low sugar content

Studies on table grape germplasm grown in Northern Greece. I. Maturity time, bunch characteristics and yield

41 local and introduced table grape cultivars of the Greek Gene Bank in Thessaloniki were evaluated and documented with regard to 10 important morphological and viticultural characteristics, e.g. maturity time, bunch form and crop yield from 1991 tb 1993. The data indicate great variation within the grape germplasm in all characters and stress the importance of the genetic material as a donor of valuable genes for further grapevine improvement. Among the earliest cultivars is the Greek newbred Attiki (harvest time: end of July), while the local traditional Sideritis was shown to be the latest maturing cultivar (end of October). Principal Component Analysis (PCA) showed 3 factors representing 69.6% of the total variation. PC1, explaining 40.6% of the total variance, is highly correlated with time of maturity and crop yield. PC2, may be considered as the bunch size factor. The assessed cultivars were classified by cluster analysis into distinct groups, 2 of which contained all early and most of the late season cultivars

Data Sparseness and Variance in Accounting Profitability

__Abstract__ A central question in strategic management is why some firms perform better than others. One approach to addressing this question empirically is to decompose the variance in firm-level profitability into firm, industry, location, and year components. Although it is well established that data sparseness in variance decomposition studies can lead to overestimating particular variance components, little attention has been paid to sample size requirements in strategic management studies that have examined the nature of differences in firm profitability. We conduct a meta-regression and variance decomposition study and conclude that the variatio

Environmental regulations and industrial competitiveness: evidence from China

Economic activities are closely related to real-world environmental issues. Currently, more attention is paid to the association between environmental regulations and industrial competitiveness (IC) because of pressures on economic development and environmental protection. In this study, we identify and explain the association between environmental regulations and IC in China. As the largest developing country in the world, China has the unavoidable responsibility of protecting the environment and promoting global economic development. We analyse the mechanisms behind environmental regulations and industrial competiveness at the provincial level and conclude that the impact of environmental regulations upon IC is not a simple linear one, but a U-shaped relationship. It is argued that the crucial intervention to activate the U-shaped relationship, or Porter’s Hypothesis, is innovation, which can be triggered by stringent regulations and well-designed policies

Urban circular policies and employment through greenfield FDI

This paper examines the association between circular strategies imposed by European cities on the attraction of greenfield foreign direct investment (FDI) and the creation of circular gross employment through greenfield FDI. We utilize a recently developed database of circular strategies employed by local authorities in 43 European cities with information on greenfield FDI in these cities and other city characteristics for the years 2016-2017. We find that urban circular policies are positively and significantly associated with the attraction of greenfield FDI-generated employment, where the effect is stronger for regulatory and economic instruments compared to soft instruments