Liquids-Rich Shale Evaluation: Modelling and Optimization of Hydraulically Fractured Liquids-Rich Shale Wells

Imperial Users onl

Chiapas, Mexico

2010 essay contest winner Linnaea Cunha\u27s Chiapas, Mexic

On Measures and Measurements: a Fibre Bundle approach to Contextuality

Contextuality is the failure of "local" probabilistic models to become global ones. In this paper we introduce the notions of \emph{measurable fibre bundles}, \emph{probability fibre bundles}, and \emph{sample fibre bundle} which capture and make precise the former statement. The central notions of contextuality are discussed under this formalism, examples worked out, and some new aspects pointed out.Comment: 14 pages; no figures; Purdue-Winer Memorial Lectures 2018; submitted to Phil. Trans. Roy. Soc. A. Comments are very welcom

Is there evidence for the existence of a financial accelerator mechanism in the Portuguese manufacturing sector?

In recent times, due to developments in the field of information economics, there was a rationalization of the link between financial factors and fluctuations in economic activity (Bernanke et al. 1996; Gertler 1988). An issue that has been highlighted is the possibility that fluctuations in economic activity can be induced (or amplified) by fragilities in a firm's financial position-the so-called financial accelerator mechanism. Based on this reasoning, I aim to contribute to the empirical literature on this issue by testing the following three hypotheses: (a) the financial position of a firm is a major determinant of its capital investment decisions; (b) the financial position of a firm is more important for firms that face higher information problems in financial markets; and (c) the financial position of a firm is even more important for firms that face higher information problems in financial markets at times of economic recession. Aggregate data for 16 industrial sectors, covering a period of time from 1990 to 2005, was used in the empirical study. These data were obtained from the Central Balance-Sheet Database of the Portuguese Central Bank. In this database, economic and financial information on Portuguese nonfinancial firms is included.

The dynamics of managerial ideology: analyzing the cuban case

After the collapse of state socialism in Eastern Europe, management researchers devoted considerable energy to investigate ways to smooth transition to market economies. But one country of the former Soviet bloc, Cuba resisted transition and reaffirmed loyalty to communism. Little is known about management in Cuba on the managerial impacts of the combination of two major environmental forces: the American embargo and the Soviet Union collapse, both of which have challenged the sustainability of the communist regime. This study intends to approach one particular aspect of management in Cuba: the relationship between national ideology and management practice. To analyze these topics, direct qualitative data from focus groups with Cuban managers and management professors was obtained and complemented with documentary analysis. Results suggest that the dynamics of managerial ideology can be understood as the interplay of several processes operating at distinct levels: institutional, professional, organizational and individual. The study provides a nested, multi-level understanding of management and organization as parts of a wider institutional context, which is both a source of constraint and a non-tangible resource to be used by ideological bricoleurs. The interplay between the acceptance of ideology and its use as a practical resource is a potential source of change. As such, the same professional class (managers) may be both a source of continuity and a trigger of change - a finding that is line with institutional theorys claim that it is necessary to understand both institutionalization and de-institutionalization for understanding organizational change and continuity.Cuba, managerial ideology, institutional change, ideological bricolage