Information technology substitution revisited

Zhang, Dawei; Cheng, Zhuo (June); Mohammad, Hasan A. Qurban H.; Nault, Barrie R.

Information technology substitution revisited

dc.contributor.author	Zhang, Dawei
dc.contributor.author	Cheng, Zhuo (June)
dc.contributor.author	Mohammad, Hasan A. Qurban H.
dc.contributor.author	Nault, Barrie R.
dc.date.accessioned	2020-01-24T16:16:01Z
dc.date.available	2020-01-24T16:16:01Z
dc.date.issued	2014-12-26
dc.description.abstract	Taking advantage of the opportunities created by the price adjusted performance improvement in IT depends in part on the ability of IT capital to substitute for other inputs in production. Studies in the IS literature as well as most economics training that examine substitution of IT capital for other inputs use the Allen elasticity of substitution (AES). We present a less-well-known measure for the elasticity of substitution, the Morishima Elasticity of Substitution (MES). In contrast to the AES which is misleading when there are three or more inputs – such as non-IT capital, labor and IT capital – the MES provides a substitution measure where the scale is meaningful, and the measure differs depending upon which price is changing. This is particularly important for IT capital as prices have been declining and there is evidence that IT capital can substitute for non-IT capital or labor in a qualitatively different way than non-IT capital and labor substitute for each other. Methodologically we also show the impact of imposing local regularity – for example, monotonicity of output from increases in inputs – that we do through Bayesian methods employed to estimate the underlying functions that are used to calculate various measures of substitution. We demonstrate the importance of the MES as an under-recognized measure of substitution and the impact of imposing local regularity using an economy-wide industry-level dataset covering 1998-2009 at the three-digit NAICS level. Our MES results show that reductions in the price of IT capital increase the quantity of IT capital in use but are unlikely to change the input share of IT capital – the value of IT capital as a proportion of the value of all inputs, in contrast to major studies using the AES. In addition, estimates for both elasticities of substitution are more stable after imposing local regularity. Both of these advances – that is, the MES and imposing local regularity – have potential to impact future work on IT productivity, IT pricing, IT cost estimation and any type of analysis that posits the substitution of IT capital for non-IT capital or labor.	en_US
dc.identifier.citation	Zhang, D., Cheng, Z., Mohammad, H. A. Q. H., & Nault, B. R. (2014). Information technology substitution revisited. "Information Systems Research", manuscript no. ISR-2-13-252-R3. 1-30.	en_US
dc.identifier.doi	http://dx.doi.org/10.11575/PRISM/37497
dc.identifier.uri	http://hdl.handle.net/1880/111549
dc.language.iso	eng	en_US
dc.publisher.faculty	Haskayne School of Business	en_US
dc.publisher.institution	University of Calgary	en_US
dc.rights	Unless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.	en_US
dc.subject	information systems	en_US
dc.subject	IT policy and management	en_US
dc.subject	economics of IS	en_US
dc.subject	IT susbstitution	en_US
dc.subject	production function	en_US
dc.title	Information technology substitution revisited	en_US
dc.type	journal article	en_US
dc.type	acceptedVersion	en_US
dc.type	journal article	en_US
dc.type	acceptedVersion	en_US
ucalgary.item.requestcopy	true	en_US