/*********************  senicreg97e.sps  *******************/

include 'senicread97.sps'. /* Reads & Labels data
subtitle 'SENIC DATA: Multiple Regression with Interactions'.

Comment: rg1 to rg3 make South the (modal) reference category
compute rg1 = r1.
compute rg2 = r2.
recode region (missing=sysmis) (4=1) (else=0) into rg3.

/* Create Z-scores EASILY
descriptives / variables = stay age nbeds census nurses service
                           xratio culratio
             / save.  /* Saves zstay ... zculrati

/* Interactions are represented by products */
compute agestay = zage*zstay.
compute staybeds = zstay * znbeds.
compute staycen = zstay * zcensus.    /* etc.

regression variables = zstay to zculrati mschool rg1 to rg3
                       infrisk staycen
     /dependent=infrisk /enter.   /* Note use of "to"