Martha Lucia Villa

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The true value of ultrasound in acute abdominal pain lies in its ability to detect gynecologic disorders and effectively rule out other causes of acute abdominal pain that require surgical repair. Although the emergent gynecologic indications discussed in this article are few in number, this does not suggest that the nonpregnant patient presenting to the ED(More)
  • Juan Jose Echavarria, Mauricio Villamizar-Villegas, +6 authors Tatiana Venegas
  • 2016
In this paper, we use the largest exchange rate survey in Colombia to test for the rational expectations hypothesis, the presence of a time-varying risk premium and the accuracy of exchange rate forecasts. Our findings indicate that episodes of exchange rate appreciation preceded expectations of further appreciation in the short run, but were marked by(More)
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