MODELING INVESTMENT-SECTOR EFFICIENCY SHOCKS: WHEN DOES DISAGGREGATION MATTER?

• 成果类型: Article
• 署名作者: Guerrieri, Luca; Henderson, Dale; Kim, Jinill
• 署名单位: Federal Reserve System - USA; Federal Reserve System Board of Governors; Cardiff University; Korea University
• 刊物名称: INTERNATIONAL ECONOMIC REVIEW
• ISSN/ISSBN: 0020-6598
• DOI: 10.1111/iere.12075
• 发表日期: 2014
• 页码: 891-917
• 关键词: technological-change; BUSINESS

摘要

The most straightforward way to analyze investment-sector productivity developments is to construct a two-sector model with a sector-specific productivity shock. An often used modeling shortcut accounts for such developments using a one-sector model with shocks to the efficiency of investment in a capital accumulation equation. This shortcut is theoretically justified when some stringent conditions are satisfied. Using a two-sector model, we consider the implications of relaxing several of the conditions that are at odds with the U.S. Input-Output Tables, including equal factor shares across sectors. The effects of productivity shocks to an investment-producing sector of our two-sector model differ from those of efficiency shocks to investment in a one-sector model. Notably, expansionary productivity shocks boost consumption in every period, whereas expansionary efficiency shocks cause consumption to fall substantially for many periods.