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Investment without Q

Vito Gala

The Wharton School

Joao F. Gomes

The Wharton School

January 22, 2013

AFA 2013 San Diego Meetings Paper

We estimate investment policy functions under general assumptions about technology and markets. Policy functions are easy to estimate and summarize the key predictions of any dynamic investment model. Because our method does not rely on Tobin's Q, it does not require information about market values and can be readily applied to study private firms. In addition, unlike Tobin's Q, we show that investment policy functions account for a large fraction of the variation in corporate investment. As such they are much better suited to evaluate and estimate dynamic investment models. Using this superior characterization of firm investment behaviour we then use indirect inference methods to estimate deep parameters of a structural model of investment featuring decreasing returns to scale and generalized adjustment cost functions.

Number of Pages in PDF File: 32

Keywords: Corporate Investment, Firm Decisions, Indirect Inference

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Date posted: March 20, 2012 ; Last revised: May 10, 2016

Suggested Citation

Gala, Vito and Gomes, Joao F., Investment without Q (January 22, 2013). AFA 2013 San Diego Meetings Paper. Available at SSRN: https://ssrn.com/abstract=2024716 or http://dx.doi.org/10.2139/ssrn.2024716

Contact Information

Vito D. Gala (Contact Author)
The Wharton School ( email )
The Wharton School
3620 Locust Walk
Philadelphia, PA 19104
United States

João F. Gomes
The Wharton School ( email )
2329 SH-DH
3620 Locust Walk
Philadelphia, PA 19104
United States
215-898-3666 (Phone)
215-898-6200 (Fax)
HOME PAGE: http://http:/fnce.wharton.upenn.edu/profile/930/overview

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