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This book evaluates formally the theory of rational bubbles. A general procedure for deriving rational bubbles is provided in the first part of the book. All bubble processes discussed in literature so far could be obtained by the procedure presented. Furthermore, the set of bubble processes has been extended significantly. After presenting the most important applications various approaches of testing for rational bubbles are summarized. Finally, a so called direct test for the existence of some previously obtained new bubble processes on the German Stock market is carried out. It became evident that the movement of stock prices, in particular during 1985 - 1987 and at the beginning of 1990s, could be well explained by the existence of rational bubbles, at least when stock indexes were used

El artículo presenta un conjunto de relatos que sirven como fuentes documentales para caracte­rizar los modos de ser, las manifestaciones y las prácticas de los bogotanos para el xix y la primera mitad del xx. Se busca aportar insumos para la reflexión sobre el patrimonio cultural inmaterial de la ciudad y complementar el análisis que se ha hecho sobre los personajes y grupos humanos, la apropiación de los lugares, el mobiliario y los servicios públicos, los tipos y modos de alimen­tación; los festejos, las celebraciones y el manejo del tiempo libre. Para lo cual, se parte de la idea de que el patrimonio es una construcción social e histórica que produce memorias compartidas e incuba sentimientos de pertenencia. El artículo utiliza la prensa escrita de circulación local como fuente de análisis, por ser un dispositivo que genera y reproduce discursos sobre lo cotidiano.

This article examines the generative mechanisms and underlying contingencies of innovative search. Extending behavioral arguments to the public sector context, it proposes that changes in innovative activity reflect either of two organizational search processes. The first process, commonly known as problemistic search, is triggered by negative performance feedback and initiated to identify appropriate solutions for the performance problem at hand. The second process is known as slack search. It is driven by the availability of excess resources, which decision makers seek to employ most fruitfully. In addition to these fundamental driving forces of innovative search, the proposed behavioral model attributes important moderating roles to organizational slack and regulatory endorsement. In particular, it suggests that public service organizations with high levels of available slack are most likely to engage in problemistic search following perceived performance shortfalls. Similarly, it is assumed that problemistic search is most salient among organizations with full regulatory endorsement. Conversely, when endorsement is low, slack search gains in importance. These behavioral propositions are tested based on novel panel data from the entire population of public nonspecialist hospital organizations in the English National Health Service. Findings from fixed-effects panel regression analyses offer broad support for the proposed behavioral model of innovative search, which has important implications for public administration research and practice. Adapted from the source document.

This article examines whether the payoff from engaging in innovation‐generating activities is contingent on an organization's level of customer and learning orientation. The authors suggest that innovative activity is associated with higher public service quality when the level of customer and learning orientation within the focal organization is high. They test this hypothesis by drawing on a novel panel data set covering all public nonspecialist hospital organizations in England. Using dynamic panel data estimation techniques, the authors find strong support for a direct relationship between innovative activity and public service quality and for a moderating role of both customer and learning orientation. These findings call for a contingency perspective on public sector innovation and highlight some of the boundary conditions that need to be in place if public service organizations are to benefit fully from their innovative activities.