"Sports economics"@en . . "Effort"@en . "Baseball"@en . "Ability"@en . "Mathieu Jardin" . "Jardin" . "Team performance"@en . . "Mathieu" . "Wage dispersion"@en . "5d3bc12f196a569849821a649e72951f" . "Semi-parametric analysis"@en . "Labour economics"@en .