Measuring the Returns to Networking and the Accumulation of Social Capital: Any Evidence of Bonding,Bridging, or Linking?

This article presents analyses of individual investment in social capital using both the British Household Panel Survey (BHPS) and the UK Time Use Survey (2000) (UKTUS). We suggest a general theoretical framework that could possibly explain individual investment in various forms of social networking. Measures of social capital are then constructed in an attempt to capture the extent of individual investment in bonding, bridging, and linking networks. These measures, together with other socioeconomic indicators, are used as explanatory factors in wage equations, estimated using ordered probit, OLS, and instrumental variable approaches. We are unable to identify any consistent returns from investment in bonding and bridging networks. In contrast, the evidence suggests that any returns to investment in the development of linking social capital simply derive from the positive signals that group membership may transmit to potential employers. Our results underline the contrast between studies that consider social capital as an attribute of communities, as opposed to individuals, in that we find a negative return to social activity at the level of the individual.     

Risk parity portfolio optimization under a Markov regime-switching framework

We formulate and solve a risk parity optimization problem under a Markov regime-switching framework to improve parameter estimation and to systematically mitigate the sensitivity of optimal portfolios to estimation error. A regime-switching factor model of returns is introduced to account for the abrupt changes in the behaviour of economic time series associated with financial cycles. This model incorporates market dynamics in an effort to improve parameter estimation. We proceed to use this model for risk parity optimization and also consider the construction of a robust version of the risk parity optimization by introducing uncertainty structures to the estimated market parameters. We test our model by constructing a regime-switching risk parity portfolio based on the Fama–French three-factor model. The out-of-sample computational results show that a regime-switching risk parity portfolio can consistently outperform its nominal counterpart, maintaining a similar ex post level of risk while delivering higher-than-nominal returns over a long-term investment horizon. Moreover, we present a dynamic portfolio rebalancing policy that further magnifies the benefits of a regime-switching portfolio.     

The double‐edged effect of knowledge acquisition: How contracts safeguard pre‐existing resources

Research summary : Acquiring knowledge on a partner's pre‐existing resources plays an important yet ambiguous role in collaborative relationships. We formally model how contracts trade off productive and destructive uses of knowledge in a buyer‐supplier relationship. We show that, when the buyer's pre‐existing resources are vulnerable to the revelation of sensitive knowledge, the supplier overinvests in knowledge acquisition as it expects to use the knowledge as a threat in price negotiations. A non‐renegotiable closed‐price contract prevents such overinvestment and reduces the supplier's ability to expropriate the buyer ex post. Our results extend to the cases of renegotiable closed‐price contracts, repeated interactions between a buyer and a supplier, and the use of nondisclosure policies. We draw theoretical, empirical, and managerial implications from our model. Managerial summary : This study yields new insights regarding the use of contract design in protecting pre‐existing, nonrelationship specific assets in buyer‐supplier arrangements. Anecdotal examples illustrate the “dark side” of these arrangements where opportunistic suppliers exploit knowledge of buyers' pre‐existing resources to seek rent and appropriate value. When a supplier is likely to act harmfully, a closed‐price contract that specifies the price of the supplier's component upfront may reduce the supplier's incentives to overinvest in acquiring and exploiting knowledge of the buyer's pre‐existing resources. As such, when a buyer's pre‐existing resources are highly valuable, and thus more vulnerable to use by the supplier outside of the arrangement, a non‐renegotiable closed‐price contract is more efficient. Additionally, limited disclosure policies and informal agreements based on repeated interactions complement indirect governance via price contracts. Copyright © 2015 John Wiley & Sons, Ltd.     

Rock around the clock: An agent-based model of low- and high-frequency trading

We build an agent-based model to study how the interplay between low- and high-frequency trading affects asset price dynamics. Our main goal is to investigate whether high-frequency trading exacerbates market volatility and generates flash crashes. In the model, low-frequency agents adopt trading rules based on chronological time and can switch between fundamentalist and chartist strategies. By contrast, high-frequency traders activation is event-driven and depends on price fluctuations. High-frequency traders use directional strategies to exploit market information produced by low-frequency traders. Monte-Carlo simulations reveal that the model replicates the main stylized facts of financial markets. Furthermore, we find that the presence of high-frequency traders increases market volatility and plays a fundamental role in the generation of flash crashes. The emergence of flash crashes is explained by two salient characteristics of high-frequency traders, i.e., their ability to i. generate high bid-ask spreads and ii. synchronize on the sell side of the limit order book. Finally, we find that higher rates of order cancellation by high-frequency traders increase the incidence of flash crashes but reduce their duration.     

Localised Technological Change: The Interaction Between The Generation And The Diffusion Of New Technologies

The main contribution of this paper is to explore the role played by heterogeneity in supply and demand in selecting technological paths amongst many different alternatives, and in localising technological change in niches of potential adopters. Technological change is therefore inherently localised. For given levels of technological superiority, the innovations that are selected during the diffusion process are shown to be sensitive to the specificities of the production process at those points.     

Social Interactions, Local Spillovers and Unemployment

I analyse a model that explicitly incorporates local interactions and allows agents to exchange information about job openings within their social networks. Agents are more likely to be employed if their social contacts are also employed. The model generates a stationary distribution of unemployment that exhibits positive spatial correlations. I estimate the model via an indirect inference procedure, using Census Tract data for Chicago. I find a significantly positive amount of social interactions across neighbouring tracts. The local spillovers are stronger for areas with less educated workers and higher fractions of minorities. Furthermore, they are shaped by ethnic dividing lines and neighbourhood boundaries.     

The Theory and Practice of Regulation with Multinational Enterprises

The ability of firms to operate in several markets at the same time is changing regulators' tasks. Regulatory bodies are now having to deal with multinational firms which spread their business activities all over the world. This paper analyzes the theory and practice of regulation in terms of the multinational dimensions of regulated firms. We show that the perceived theory of regulation is indeed affected, and that new issues arise both from a positive and normative point of view.     

Export restraints in a model of trade with capital accumulation

This paper examines the impact of voluntary export restraints (VERs) in an international duopoly modeled as a differential game. With a Ramsey capital accumulation dynamics, the game admits multiple steady states, and a VER cannot be ‘voluntarily’ employed by the foreign firm in case of Cournot behavior in demand substitutes. Hence, the dynamic framework confirms the results of the VERs literature with static interaction in output levels. In the case of price behavior, the adoption of an export restraint may increase the profits of both firms if products are substitutes and the steady state is ‘market-driven’. However, contrary to the acquired wisdom based upon the static approach, the dynamic analysis also admits an equilibrium outcome, identified by the Ramsey golden rule, where the incentive to adopt a VER is ruled out, irrespective of whether firms are quantity- or price-setters.     

Income distribution dynamics among Italian provinces. The role of Bank Foundations

This paper investigates the convergence process and the distribution dynamics of income among Italian NUTS-3 provinces between 2003 and 2011. Findings show the existence of multiple steady-state equilibria which is consistent with the well-documented persistence in income disparities among Italian provinces. The role of grant-making activities by Bank Foundations is assessed on a conditioning scheme. Results suggest that Bank Foundations can affect the shape of the distribution of income and, in the long run, reduce polarization with a tendency for income to collapse towards a unimodal distribution.     

Knowledge externalities,innovation and growth in European countries: the role of institutions

This paper provides an empirical analysis of the linkages between institutions and economic growth in the European context and highlights innovation as the intermediate variable that drives this interplay. Building on the literature in the evolutionary approach to the economics of innovation and in the economic growth theory with a political economic perspective, we assume that knowledge externalities can fully take place where institutions guarantee a level playing field in the access to knowledge. We estimate the effects of a set of relevant institutional variables on the growth rate of technological knowledge and per capita GDP for a sample of European countries. The empirical analysis confirms that institutions that tend to equalise opportunities to innovate significantly amplify the impact of an exogenous increase in the knowledge base on the growth rate of per capita GDP.