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Set in Stone? Change and Innovation in Consumer Standard-Form Contracts

46 Pages Posted: 15 Jul 2012 Last revised: 11 Jun 2014

Florencia Marotta-Wurgler

New York University School of Law

Robert Brendan Taylor

Kirkland & Ellis LLP

Date Written: July 11, 2012


This article studies the rate, direction, and determinants of change in consumer standard form contracting. We examine what changed between 2003 and 2010 in the terms of 264 mass-market consumer software license agreements. Thirty-nine percent of contracts materially changed at least one term, and some changed as many as fourteen terms. The average contract became more pro-seller as well as several hundred words longer. The increase in length is not due to the use of simpler language: contract readability has been constant: the average contract is as readable as an article in a scientific journal. Younger, larger, growing firms, and firms with in-house counsel were more likely to change existing terms and to introduce new terms to take advantage of technological and market developments. Contracts appeared to respond to litigation outcomes: Terms that were increasingly enforced by courts were more frequently used in contracts, and vice-versa. The results indicate that software license agreements are relatively dynamic and shaped by multiple factors over time. We discuss potential consumer protection implications as a result of the increased length and complexity of contracts over time.

Keywords: contracts, commercial law, consumer law

JEL Classification: K12; K41

Suggested Citation

Marotta-Wurgler, Florencia and Taylor, Robert Brendan, Set in Stone? Change and Innovation in Consumer Standard-Form Contracts (July 11, 2012). New York University Law Review, Vol. 88, 2013; 7th Annual Conference on Empirical Legal Studies Paper; NYU Law and Economics Research Paper No. 12-40. Available at SSRN: or

Florencia Marotta-Wurgler (Contact Author)

New York University School of Law ( email )

40 Washington Square South
New York, NY 10012-1099
United States


Robert Brendan Taylor

Kirkland & Ellis LLP ( email )

333 S Hope St
Los Angeles CA, CA 90071
United States

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