-mapch- maps chains of events. A 'chain' consists of at least one event; an 'event' in this context pertains to a change of information. For example, if 'A' changes into 'B' and 'B' changes into 'C', then this chain consists of two events, the first one being the change of 'A' into 'B' and the second one being the change of 'B' into 'C'. These changes are mapped and the end value of the chain is added as a new variable to each event in the chain (so the line "A B" in your database would become "A B C" and the line "B C" would become "B C C"). -mapch- also tabulates the frequency of n-step chains with n<1<=N (N=total number of events in your database). Mapping chains in a database of several tens of thousands of events can be done in as little as a couple of seconds.
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Publisher Info
Software component provided by Boston College Department of Economics in its series Statistical Software Components with number
S456913.
Size: Programming language: Stata Requires: Stata version 10 Date of creation: 11 Feb 2008 Date of revision: Handle: RePEc:boc:bocode:s456913
Note: This module may be installed from within Stata by typing "ssc install mapch". Windows users should not attempt to download these files with a web browser. Contact details of provider: Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA Phone: 617-552-3670 Fax: +1-617-552-2308 Email: Web page: http://fmwww.bc.edu/EC/ More information through EDIRC