{'fraction_non_alphanumeric': 0.015690376569037656, 'fraction_numerical': 0.0020920502092050207, 'mean_word_length': 5.787234042553192, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Assignment Models and Quantitative Mismatches

Qualitative mismatches arise when the qualifications or skills of workers, individually or in the aggregate, are different from the qualifications or skills required or specified for their jobs. This review develops the distinction between short run mismatches occurring between workers and jobs and long run aggregate mismatches that arise from shifts in supplies and demands for workers. The review provides an analysis of the incidence of qualitative mismatches in terms of regression towards the mean. Alternative explanations for wage consequences of qualitative mismatches are considered including assignment models with Nash bargaining. Prepared for the Expert Workshop "Skill Mismatch and Firm Dynamics: Integrating Skills with the World of Work," April 27, London, organized by the European Centre for the Development of Vocational Training (CEDEFOP) and the Centre for Research in Employment, Skills