Entrevista Guillermo Pérez Villalta

Estudio experimental de la efectividad de la entrevista abierta frente a la entrevista independiente de contexto

Resumen. OBJETIVO: Estudiar la efectividad relativa de las técnicas de entrevista abierta y entrevista independiente de contexto en la identificación de requisitos para sistemas software. MÉTODO: Experimento controlado ensayando dos factores: “tipo de entrevista” (abierta e independiente de contexto) y “tipo de problema” (identificación de requisitos para dos sistemas software distintos). Debid...

Guillermo Cortiñas And

We show how methods from K-theory of operator algebras can be applied in a completely algebraic setting to define a bivariant, M∞-stable, homotopy-invariant, excisive Ktheory of algebras over a fixed unital ground ring H, (A, B) 7→ kk∗(A, B), which is universal in the sense that it maps uniquely to any other such theory. It turns out kk is related to C. Weibel’s homotopy algebraic K-theory, KH....

Capital Inflows , Liquidity and Bubbles Guillermo

Policymakers in Emerging Market economies (EMs) are facing a serious dilemma: while their economies are currently benefiting from a surge of capital inflows, they fear a replay of the 1990s and early 2000s when their economies underwent costly Sudden Stops (of capital inflows). A serious concern is that a capital‐inflow episode could give rise to "bubbles," i.e., an artificial or transitory inc...

Campylobacter and Helicobacter Guillermo I . Perez - Perez

Guillermo Gallego and Catalina Stefanescu 1

U.S. airlines achieved a startling turnaround in 2009. Profits rose to $2.3 billion after a loss of $3.3 billion the year before. Also during 2009, the airlines collected $2.7 billion in baggage fees (U.S. Bureau of Transportation Statistics 2010). In other words, by charging separately for a service once associated with the price of a ticket, the airlines turned a potential loss into a profit....