Cycling ewes with lesions placed in the anterior region of medial basal hypothalamus (MBH) showed no estrous behavior, but they all had ovulations and cyclical corpora lutea at physiological terms. Participation of the anterior region of MBH in control of sexual behavior was also supported by the experiments on castrated sheep implanted with 17-beta-estradiol into the area determined previously...

This paper studies the role of labor market institutions on unemployment and on the cyclical properties of job flows. We construct an intertemporal general equilibrium model with search unemployment and endogenous job turnover, and examine the consequences of introducing an unemployment benefit, a firing cost and a downward wage rigidity. The model is able to reproduce the main cyclical propert...

Most of the empirical work on investment is based on the existence of a relation between investment and the expected present val of marginal profits. Thus, in this paper we compute such a present value series, under various assumptions about demand and technology and examine its relation to investment. We find that variations in this present value series are, surprisingly, due more to variation...

The gut microbiome and daily feeding/fasting cycle influence host metabolism and contribute to obesity and metabolic diseases. However, fundamental characteristics of this relationship between the feeding/fasting cycle and the gut microbiome are unknown. Our studies show that the gut microbiome is highly dynamic, exhibiting daily cyclical fluctuations in composition. Diet-induced obesity dampen...