| 来源类型 | Working Paper |
| 规范类型 | 报告 |
| DOI | 10.3386/w27389 |
| 来源ID | Working Paper 27389 |
| Dynamics of Markups, Concentration and Product Span | |
| Elhanan Helpman; Benjamin C. Niswonger | |
| 发表日期 | 2020-06-22 |
| 出版年 | 2020 |
| 语种 | 英语 |
| 摘要 | We develop a model with a finite number of multi-product firms that populate an industry together with a continuum of single product firms, and study the dynamics of this industry that arises from investments in the invention of new products. Consistent with the available evidence, the model predicts rising markups and concentration and a declining labor share. We then examine the dynamics of market shares and product spans in response to improvements in the technologies of the multi-product and single product firms, and the impact of these changes on the steady state distribution of market shares and product spans. Our model predicts the possibility of an inverted-U relationship between labor productivity and product span in the cross-section of firms, for which we provide suggestive evidence. It also predicts that rising entry costs of single-product firms may flatten the relationship between labor productivity and market shares of the large multi-product firms. |
| 主题 | Microeconomics ; Market Structure and Distribution ; Industrial Organization ; Market Structure and Firm Performance ; Firm Behavior |
| URL | https://www.nber.org/papers/w27389 |
| 来源智库 | National Bureau of Economic Research (United States) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/585062 |
| 推荐引用方式 GB/T 7714 | Elhanan Helpman,Benjamin C. Niswonger. Dynamics of Markups, Concentration and Product Span. 2020. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| w27389.pdf（814KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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