Zoe zwiebelmann maastricht university im session 2 43

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Zoe Zwiebelmann Maastricht University IM Session 2 4.3 THREE COMPLEMENTARY METHODS FOR COUNTING IT TERMS • 1) healthcare dictionary 2) text mining 3) manual identification HEALTHCARE DICTIONARY • IT terms in healthcare dictionary obtain 3,703 terms • overcoming limitation of missing firm-specific healthcare IT terms: using latent semantic analysis TEXT MINING Latent Semantic Analysis (LSA): approach to text analysis that was developed to look beyond the simple occurrences of words; one of several text-mining dimension reduction methods • LSA represents an original text-document matrix into the smaller dimensions of a factor-document matrix classifies into one factor = clustering terms that ‘belong to each other’ drawback: LSA cannot identify the polysemy of a term, where a term has multiple meanings solution in this study: to get homogenous meanings of IT terms, non-IT-related paragraphs are excluded from the letters, and newly assembled which leads to factors now only including IT terms MANUAL IDENTIFICATION • checking of non-IT letters that are manually excluded from analysis to ensure that do not contain IT 4.4 CONTROL VARIABLES firm performance can be influenced by firm size and capital intensity = these will be control variables 4.5 MODELS testing H1: robust regression analysis testing H2: two-level mixed model within firm and between firms logic: first remove spurious association in firm’s growth model by using time variable 5. RESULTS HYPOTHESIS 1 • implicit assumptions: the more a firm adopts Information Systems and expects benefits from them, the more IT terms are used • CEO perception rises between 1997 and reaches peak in 2000, then decreases and reaches trough in 2005, afterwards increases again reject H1 HYPOTHESIS 2
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Zoe Zwiebelmann Maastricht University IM Session 2 • negative sign for IT terms, initiative type, expected effects & significance of estimates, shows that effect of CEO perception on firm performance slightly decreases over time reject H2 6. DISCUSSION • although CEO’s perceptions of IT are increasing, the association of IT perception with firm performance is decreasing (which would be evidence of IT commoditization) possible explanations for increasing CEO perception of IT: 1) technology boom of late 1990s 2) trend toward multi-functioned IS = CEOs expect more benefits in later years than in early years (more likely that IT is mentioned toward end of ten-year window)
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