Testing the proportionality of two large-dimensional covariance matrices is studied. Based on modern random matrix …

Empirical tests of purchasing power parity (PPP) are implicitly based on the conditions of symmetry and proportionality …

demand: this is the so-called “import comparability” or “proportionality” assumption. A report to the National Research … proportionality assumption, and a higher correlation of 0.87 when the shares are value weighted. While most value-weighted industries …

, we propose a new test for the proportionality of two large p×p covariance matrices Σ1 and Σ2. By applying modern random …

conditions. One way to resolve this dilemma is by imposing an additional condition, such as the condition of proportionality. …

a general standard of proportionality in exchange as a constraint on the full application of freedom of contract. …

that exhibit uniqueness of the class flows and proportionality (Bar-Gera et al., 2012). Several new algorithms have been … proportionality and class uniqueness of the flows. Recently developed, the TAPAS, algorithm (Bar Gera, 2010) is able to produce … solutions that have proportionality embedded, without requiring post processing. It was generally accepted that these methods …

relative CPI. None of the estimated elasticities is statistically equal to unity, suggesting that proportionality may not apply. …

measures of proportionality to be used in the empirical investigation, we find considerable support for our predictions. …