Robust portfolio choice with stochastic interest rates

We determine the optimal investment strategy for an ambiguity-averse investor in a setting with stochastic interest rates. The investor has access to stocks, bonds, and a bank account and he is ambiguous about the expected rate of return of both bonds and stocks. The investor can have different levels of ambiguity aversion about the two types of risky assets. We find that it is more important to take model uncertainty about the stock dynamics than model uncertainty about the bond dynamics into account. Furthermore, the investor’s ambiguity increases his hedging demand. Consequently, the bond/stock ratio increases with his ambiguity and implies less extreme positions in the bank account. Altogether, our model yields portfolio allocations which are more in line with what is implementable in practice. Finally, we demonstrate that neglecting model uncertainty implies significant losses for the investor.     

火热经济与忧伤的中国人

金钱能买来幸福吗？没人回答能，包括那些改革开放中出现的中国暴发户。 可以肯定的是，中国确实在很多方面值得夸耀：现在已经是世界第二大经济体，仅次于美国，人均收入从1980年的不足200美元增长到2010年的3700美元，约3亿农民摆脱了绝对贫困。公民的预期寿命延长了十年。     

Capital Structure and Assets: Effects of an Implicit Collateral

This paper analyses a firm's capital structure choice when assets have outside value. Valuable assets implicitly provide a collateral and increase tax shield exploitation. The key feature in this paper is asset value uncertainty, implying that it is unknown ex ante whether the equity holders ex post optimally sell the assets or re‐optimise the capital structure. Ex ante, more uncertain asset value decreases leverage, but not firm value, and selling the assets becomes less likely. Firms should tend to invest in assets whose value is less correlated to changes in earnings and, in addition, asset sales are less likely when this correlation is low.     

Propuesta de un índice para evaluar la gestión del control interno

Derived from its humanitarian mission, to pay quality health care to the population, in hospitals and health facilities is needed reduce the occurrence of events that may threaten the physical and psychological integrity of the patients they serve. One of the strategies to consider to overcome this challenge is the proper implementation of the internal control system, to ensure the sustainability of insurers, by increasing efficiency in the care of people, feasible only within a care model that quantifies and management on population identified and addressed. The objective of this paper was to propose a coefficient to evaluate the internal control management for a hospital entity. This was conceived under the guidelines of the multi-criteria modeling in conjunction with the detection of critical points through Petri nets. For this, the order of importance and fulfillment of the components of Internal Control and in unison the unreliability of critical processes in the entity being identified practical application was determined.     

An exploratory analysis of the relationship between absorptive capacity and business strategy

In this study, we argue that a firm's absorptive capacity will vary depending on the strategy it adopts. To examine this, based on the fact that absorptive capacity is developed through the ability to acquire, assimilate, transform and exploit externally-generated knowledge, we look at the importance of each of these dimensions at firms pursuing different business strategies. To reflect business strategy, we draw on Miles and Snow's typology. The information has been obtained based on a sample made up of 81 Spanish small and medium-sized enterprises. Results show that knowledge acquisition capacity is greater at prospectors than at defenders and analysers, and that transformation and exploitation capacities are greater at prospectors than at defenders. No differences in knowledge assimilation capacity are observed.     

Land consolidation in inland rural Galicia, N.W. Spain, since 1950: An example of the formulation and use of questions, criteria and indicators for evaluation of rural development policies

This paper examines whether the land consolidation (LC) practised since the 1950s in Galicia, N.W. Spain, has had the desired effects. To achieve this aim, we have adopted the methodology drawn up by the European Union for evaluation of its socioeconomic programmes, and we have adapted it as required by the subject matter and by the long-term historical perspective of this study. Our results suggest that, during the study period, LC has in general made a positive contribution to slowing rural depopulation.     

Migrant human and political capitals value in entrepreneur enterprise performance. A comparative study of four emerging markets

This paper investigates the impact of human and political capitals of entrepreneurs on enterprise performance in four emerging nations.The rent generation potential of these capitals is a well established fact, however, much less is known concerning the contingent nature of their value creation prowess. In this work, we draw on institutional theory and dynamic managerial capabilities perspective to examine the interactive effect of country of origin economic developement level and the international experience of entrepreurs, on the capitals, with respect to a set of financial indicators. Employing a quantitative methodology, our findings reveal that the relationship between the capitals and enterprise performance are indeeed contingent with the capitals of home-grown entrepreneurs, rather than those of returnee migrant entrepreneurs, exhibiting a greater propensity to influence enterprise performance. We conclude with implications for theory and practice.

     

Conditional factors Pushing catch-up across developed and emerging countries in the nanotechnology sector, 2000–2010

ABSTRACT

The aim of this article is to test national and sectorial technological and innovation capability factors, as well as social capability indicators, which could explain a possible conditional convergence across countries in nanotechnology within the context of a model of innovative technological knowledge β convergence. Based on growth convergence models, our proposal also takes into account the Schumpeterian theory, the National System Innovation –NSI– approach, and particularly the sectorial system of innovation and the technological catch-up hypothesis, as well as theoretical and empirical literature on conditional convergence. The findings allow us to confirm that new nanotechnology knowledge convergence is conditioned by a higher growth rate of technological capabilities in nanotechnology: growth from the initial level of patents granted, cumulative knowledge, and links to technological and scientific activities. Finally, as regards social capabilities, only the institutional weakness variable (corruption index) associates negatively with β convergence. As an emergent paradigm, we realize that convergence and catch-up are starting processes, which could allow less technologically developed countries to benefit from higher growth of some of the factors identified.     

Technological advances and the decision to invest

Technological advances impact a firm’s investment decision, as they affect the investment cost. They can also affect the profitability due to demand shocks. We study a firm’s optimal investment decision when technological advances occur as surprises and induce uncertain reductions in the investment cost and in earnings. Despite this complex setting we derive closed-form solutions for the investment option value and the investment threshold. When technological advances only impact the investment cost, we demonstrate significant contributions compared to existing research, which restricts the analysis by keeping the expected investment cost path constant. For example, we show that, albeit the investment threshold is constant, the option value is very sensitive in the expected impact of technological advances. Leaving the restrictive setting, we obtain more intuitive results, e.g. that more frequent technological advances increase the option value. When technological advances impact future earnings we find important long-term effects: the investment threshold increases, whereas the option value decreases. Finally, earnings volatility postpones investment, while uncertainty due to technological advances expedites investment.     

Farmers,institutions and technology in agricultural change processes: outcomes from Adaptive Research on rice production in Sulawesi,Indonesia

International agricultural research centres use approaches which aim to create effective linkages between the practices of farmers, introduced technologies and the wider environment that affects farming. This paper argues that such new approaches require a different type of monitoring as a complement to conventional approaches that tend to favour a quantitative assessment of adoption and impact at the farm level. In this context, we examined monitoring data from an Adaptive Research (AR) project highlighting complementary qualitative analysis. Our emphasis is to capture the improvisational capacities of farmers and to reveal social and institutional constraints and opportunities in a broader innovation system. Our approach provided clear insights into how rice farmers adjusted their practices and how actors involved linked (or not) with others in the innovation system. We also demonstrated how institutions such as policies, religious rituals or service provider arrangements pose conditions that establish or constrain practices aligned with introduced technologies. A broader perspective in monitoring AR therefore provides important additional insights into the factors which shape outcomes in farming communities. To expand outcomes, AR projects should also pay attention to designing and testing new institutional arrangements that create enabling conditions for agricultural innovation.