One of the main characteristics of trade in services is that a limited number of services can be traded across the border. In fact, a larger number of services require physical contact between consumers and producers in order to allow the transaction to occur. In this respect, trade in services has been classified by four modes of supply: Mode 1, cross-border trade; Mode 2 , consumption abroad;...

Introduced by Samuelson (1975), the Serendipity Theorem states that the competitive economy will converge towards the optimum steady-state provided the optimum population growth rate is imposed. This paper aims at exploring whether the Serendipity Theorem still holds in an economy with risky lifetime. We show that, under general conditions, including a perfect annuity market with actuarially fa...

The ethylene glycol bis(P-aminoethyl ether)-N, N’-tetraacetic acid-sensitizing factor extracted from natural actomyosin at low ionic strength was concentrated in the fraction obtained between 40 and 60% ammonium sulfate saturation. Fractionation within narrower salt limits and at low protein concentrations yielded a troponin-rich fraction at 40 to 53% saturation and a tropomyosin-rich fraction ...