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Estimation of urban bus transit marginal cost without cost data

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  • Batarce, Marco

Abstract

We develop a method to study the industrial structure of urban bus transit without using cost data. To do so, we estimate the marginal cost function under the assumption that firms compete on frequency and adjust frequency to maximize profits. Our methodology is applied to Santiago, Chile. In this case, demand is modeled with a simplified model of transit network assignment. The goal is to consider how frequency, capacity, and on-board passengers affect the bus line’s demand. The marginal cost function is estimated by using the first-order conditions of the firm’s profit maximization problem, using the results of the demand model as data. We conclude that the urban bus transit industry in Santiago exhibits increasing returns to scale for low levels of demand and that these returns are exhausted rapidly at a moderate demand level. Additionally, firms exhibit economies of network expansion, on average.

Suggested Citation

  • Batarce, Marco, 2016. "Estimation of urban bus transit marginal cost without cost data," Transportation Research Part B: Methodological, Elsevier, vol. 90(C), pages 241-262.
  • Handle: RePEc:eee:transb:v:90:y:2016:i:c:p:241-262
    DOI: 10.1016/j.trb.2016.05.004
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    Keywords

    Cost estimation; Bus transit; Marginal cost;

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