This paper proposes a new test for testing the equality of two covariance matrices Σ1 and Σ2 in the high-dimensional setting and investigates its theoretical and numerical properties. The limiting null distribution of the test statistic is derived. The test is shown to enjoy certain optimality and to be especially powerful against sparse alternatives. The simulation results show that the test s...

objective(s):immunosuppressive property of mesenchymal stem cells (mscs) has great attraction in regenerative medicine especially when dealing with tissue damage involving immune reactions. the most attractive tissue sources of human mscs used in clinical applications are bone marrow (bm), adipose tissue (at), and wharton's jelly (wj) of human umbilical cord. the current study has compared...

OBJECTIVE To introduce a simple and quick surgical alternative for creating a neovagina in patients with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome that offers good anatomic and functional results. DESIGN Historical report. SETTING Tertiary center for gynecologic endocrinology. PATIENT(S) Three patients with MRKH syndrome. INTERVENTION(S) The creation of a neovagina according to Wha...

25 MacLennan, D., A. Tzagoloff, and K. Takayame, unpublished observations. 26 Chance, B., Nature, 169, 215 (1952). 27 Tisdale, H. D., D. C. Wharton, and D. E. Green, Arch. Biochem. Biophys., 102, 114 (1963). 28Green, D. E., D. E. Griffith9, K. A. Doeg, and D. C. Wharton, Proc. Intern. Congr. Biochem. 5th, 4, 182 (1963). 28a Klingenberg, M., in Funktionelle und Morphologische Organisation der Ze...

et al., 1967; Zorab et al., 1970). Allison, Walker, and Smith (1966) showed that the ratio of total hydroxyproline to creatinine in a 24-hour collection of urine gives more consistent results than measurement of hydroxyproline alone, an observation which has been extended to random samples of urine collected during waking hours (Howells, Wharton, and McCance, 1967; Younoszai et al., 1969). Whar...

We present novel empirical evidence on the use of off-balance sheet financing by publiclytraded, U.S. nonfinancial firms. We find that about 5 percent of nonfinancial firms reported using a special purpose financing vehicle (SPV) to finance receivables in 2006. At the origination of the off-balance sheet financing program, firms experienced abnormal increases in stock prices on the order of 2 p...

We conduct a series of field experiments to evaluate the quality of advice provided by life insurance agents in India. Agents overwhelmingly recommend unsuitable, strictly dominated products, which provide high commissions to the agent. Agents cater to the beliefs of uninformed consumers, even when those beliefs are wrong. We test whether regulation or the market can improve advice. A natural e...

A general protocol for the synthesis of bicyclo[n.3.1]frameworks with bridgehead double bond (anti-Bredt alkenes), from a common, readily available norbornyl precursor, involving sequential ring closure metathesis (RCM) and Wharton fragmentation is outlined.

The deformation at well-defined, narrow plate boundaries depends on the relative plate motion, but how the deformation takes place within a distributed plate boundary zone remains a conundrum. This was confirmed by the seismological analyses of the 2012 great Wharton Basin earthquakes [moment magnitude (Mw) 8.6], which suggested the rupture of several faults at high angles to one another. Using...

Credit markets play an important role in the macroeconomy and credit market data is often used to predict both future macroeconomic and stock market performance. In this paper we propose a tractable general equilibrium asset pricing model with heterogeneous firms that links movements in stock and bond markets to macroeconomic activity. The model suggests that movements in risk premia in corpora...