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This paper focuses on investment in research and development as a factor of labour productivity and economic growth …. Our analysis confirms the link between expenditure for research and development (expressed in % of GDP) and labour … causal link between variables of the concave parabola was confirmed, and the value of expenditure for research and …
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Crisis, the COVID-19 pandemic and the Ukrainian War. Using the most recent developments in local Gaussian partial correlation …
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data contain much less information than one might think, due to the presence of correlation. We conclude that the prior in …
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A new test for constant correlation is proposed. Based on the bivariate Student-t distribution, this test is derived as … & Rouwenhorst, 2005) specify the unknown correlations as piecewise constant, our model-setup for the correlation coefficient is … correlation ; trigonometric functions …
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