Specialized Careers

An agent has different abilities in two types of tasks. These tasks are revealed over time through his performance. The agent initially decides whether to engage in only one task (specialize) or to take on any task that arises (be a generalist). This decision trades off the cost of being idle against staying available for relatively lucrative tasks. We compare specializing with acting as a generalist in an infinite‐horizon model and provide complete characterizations of efforts. We show how specializing acts as a means of committing to exert more effort. In a two‐period version of the model, this implies that positive costs for switching strategies, through license fees, for example, may be socially desirable.     

Lasting impacts and perceived inequities: community reappraisal of the siting of a regional biosolids processing facility in rural Ontario

This paper presents a comparative study of the shift in community perceptions pre- and post-siting of a biosolids processing facility – the Organic Material Recovery Centre – in the rural Township of Southgate, Ontario. The study responds to the need for comparative studies examining residents’ perceptions of contested noxious facilities during acrimonious siting processes and later during facility operations. Interviews were conducted before and after the techno-industrial facility was sited to compare community perceptions of the proposed and operational facility, and further examine residents’ experiences with residual impacts and reflections on the siting process. Results reveal that once the facility began operations and residents had the opportunity to understand its operational mandate and directions, many residents seem to accept the facility as less threatening to well-being, quality of life and core values. Nonetheless, sustained community concerns shifted to invisible impacts and long-term uncertainty. Findings highlight lingering intra-community conflict between those supporting and those who remained concerned about negative impacts. As a result of the hostile community conflict, the local politics seems to have morphed into a ‘one-issue’ political scene, whereby all issues are divided along the lines of municipal councillors opinions of the facility These findings make methodological contributions with pre- and post-siting comparative qualitative research and contribute theoretically to our understanding of residents’ reappraisal of contested noxious techno-industrial facilities, show sustained divisive social impacts within the community, and call for meaningful consultation and increased participatory siting processes that accounts for the diversity of values and expectations during facility siting.     

The effects of resale price maintenance laws on petrol prices and station attrition: empirical evidence from Wisconsin

The state of Wisconsin's Unfair Sales Act prevents the sale of any item below cost in order to attract business, and specifically requires petrol (gasoline) stations to mark up their prices by at least 6% over the wholesale price. While the ostensible reason for this law is to protect small, independent retailers and thus enhance competition, the evidence suggests that the primary result of this law has been to inflate the price of petrol for Wisconsin consumers and facilitate tacit collusion in retail petrol markets. Petrol prices in two major markets in the state are examined, as well as in one market outside of the state where no minimum markup is required. The data show that when the penalties for violating the Unfair Sales Act were strengthened, the average markup of retail petrol over the wholesale price increased significantly in Wisconsin without a commensurate change in the average markup in the market outside of Wisconsin. It is also found that price dispersion is significantly lower over a two-year period in the protected Wisconsin market than in the unprotected markets.     

The effects of market organization on conspiracies in restraint of trade

Mindful of the market structure-conduct-performance paradigm fundamental to industrial organization research, this paper uses laboratory experimental techniques to study the impact of conspiratorial opportunities on market performance. We compare ‘posted-offer’ markets where sellers (but not buyers) are all conspiratorial opportunities with observations from three control groups: (1) posted-offer markets without conspiratorial opportunities, (2) ‘double-auction’ markets with conspiratorial opportunities and (3) posted-offer markets with true single-seller monopolists. The basic conclusions generated by our experimental design are: (1) seller conspiracies in posted-offer markets tend to raise prices (but not profits) relative to similarly organized markets without conspiracies, (2) posted-offer conspiracies tend to generate higher prices (but not profits) than double-auction conspiracies, and (3) posted-offer monopolies tend to generate higher profits (but not prices) then posted-offer conspiracies.     

Extracting a common stochastic trend: Theory with some applications

This paper investigates the statistical properties of estimators of the parameters and unobserved series for state space models with integrated time series. In particular, we derive the full asymptotic results for maximum likelihood estimation using the Kalman filter for a prototypical class of such models—those with a single latent common stochastic trend. Indeed, we establish the consistency and asymptotic mixed normality of the maximum likelihood estimator and show that the conventional method of inference is valid for this class of models. The models we explicitly consider comprise a special–yet useful–class of models that may be employed to extract the common stochastic trend from multiple integrated time series. Such models can be very useful to obtain indices that represent fluctuations of various markets or common latent factors that affect a set of economic and financial variables simultaneously. Moreover, our derivation of the asymptotics of this class makes it clear that the asymptotic Gaussianity and the validity of the conventional inference for the maximum likelihood procedure extends to a larger class of more general state space models involving integrated time series. Finally, we demonstrate the utility of this class of models extracting a common stochastic trend from three sets of time series involving short- and long-term interest rates, stock return volatility and trading volume, and Dow Jones stock prices.     

The opportunity for conspiracy in restraint of trade: An experimental study

This study is a limited exploration into the relationship between the opportunity for conspiracy in restraint of trade and the resulting market performance. Laboratory experimental methods are applied to separate competing theories. The competitive model predicts well relative to cartel models. Nevertheless, when measurements are taken relative to the performance of markets where conspiracies are not possible, the effects of attempted conspiracies can be detected.     

In Defence of Capitalisation Weights: Evidence from the FTSE 100 and S&P 500 Indices

A simple method for decomposing the variance covariance matrix of portfolio returns at the level of individual stocks is applied to the FTSE 100 Index. During extreme negative shocks, the largest index constituents exhibit lower than average covariance, thereby reducing the volatility of the capitalisation‐weighted index. The risk‐adjusted returns of the capitalisation‐weighted FTSE 100 Index exceed those of an equally‐weighted version of the same index and the outperformance is robust to the method of risk adjustment applied. The equally‐weighted index also exhibits greater systematic (market) risk than the capitalisation‐weighted version.     

Nonlinearity,nonstationarity, and thick tails: How they interact to generate persistence in memory

We consider nonlinear functions of random walks driven by thick-tailed innovations. Nonlinearity, nonstationarity, and thick tails interact to generate a spectrum of autocorrelation patterns consistent with the observed persistence in memory of many economic and financial time series. Depending upon the type of transformation considered and whether it is observed with noise, the autocorrelations are given by unity, random constants, or hyperbolically decaying deterministic functions, possibly with some independent noise, and thus may decay slowly or even not at all. Along with other sample characteristics, such patterns suggest that these three ingredients may generate the ubiquitous evidence for long memory.