The generalized bin packing problem

In the Generalized Bin Packing Problem (GBPP), given two sets of compulsory and non-compulsory items characterized by volume and profit and a set of bins with given volume and cost, we want to select the subset of profitable non-compulsory items to be loaded together with the compulsory ones into the appropriate bins in order to minimize the total net cost. Lower and upper bounds to the GBPP are given. The results of extensive computational experiments show that the proposed procedures are efficient and the bounds are tight.     

Front-running of mutual fund fire-sales

We show that a real-time trading strategy which front-runs the anticipated forced sales by mutual funds experiencing extreme capital outflows generates an alpha of 0.5% per month during the 1990–2010 period. The abnormal return stems from selling pressure among stocks that are below the NYSE mean size and cannot be attributed to the arrival of public information. While the largest stocks also exhibit downward price pressure, their prices revert before the front-running strategy can detect it. The duration of the anticipated selling pressure has decreased from about a month in the 1990s to about two weeks in the most recent decade. Our results suggest that publicly available information of fund flows and holdings exposes mutual funds in distress to predatory trading.     

The link between personality,aggressive driving,and risky driving outcomes – testing a theoretical model

This study tested a theoretical model of the relationship between the Big Five Personality Factors, aggressive driving and ‘risky driving outcomes’ (accidents, traffic tickets, and license suspension). It also tested the mediation effect of aggressive driving in the relationship between the five factor personality model and risky driving outcomes. Structural equation modeling was used to analyze the 293 participants’ responses. Bivariate correlations showed that aggressive driving was negatively related to emotional stability, agreeableness, and conscientiousness and positively related to risky driving outcomes. Agreeableness was negatively related to accidents, tickets, and license suspension. Conscientiousness was negatively related to tickets. The structural model was supported by data in which agreeableness predicted risky driving outcomes. Emotional stability, agreeableness, and conscientiousness predicted aggressive driving, which in turn predicted risky driving outcomes. Aggressive driving was shown to be a mediator in the relationship between agreeableness and risky driving outcomes.     

The effect of multi-scenario policies on empty container repositioning

This paper addresses a container maritime-repositioning problem where several parameters are uncertain and historical data are useless for decision-making processes. To address this problem, we propose a time-extended multi-scenario optimization model in which scenarios can be generated taking into account shipping company opinions. We then show that multi-scenario policies put shipping companies in the position of satisfying empty-container demands for different values that may be taken by uncertain parameters.     

Can Mutual Fund Investors Distinguish Good from Bad Managers?

Mutual fund flows respond significantly to the return gap, which captures information about unobserved actions of mutual funds and predicts future performance. The sensitivity of fund flows to the return gap is: (i) strong and positive; (ii) increasing with investor sophistication; (iii) highly nonlinear; and (iv) decreasing with the informativeness of past fund returns. On average, the response of investors to the return gap enhances their performance. Our findings suggest there is a sophisticated mass of investors who can distinguish good from bad managers using information that may not be directly inferred from standard performance indicators.     

Institutional Ownership and Future Stock Returns: An International Perspective

We investigate the risk‐adjusted performance of the aggregate equity holdings and trades of 13,807 active mutual funds located in 16 countries between 2001 and 2014. Using portfolio sorts, we find weak evidence that institutional holdings exhibit positive subsequent risk‐adjusted returns. However, any outperformance is unlikely to stem from short‐term informational advantage: stocks bought do not outperform stocks sold in the subsequent quarter. This finding is robust to regressions of subsequent stock returns on changes in institutional ownership and holds for different measurements of institutional trading.