DATA:      Kunst el al. (1990), Ter Braak & Looman (1994)
DIRECTORY: \CANOCO\SAMPLES\UNIMODAL\DISEASES
PROBLEM:   How do the effects of SES on standardized mortality rates (smr) 
           change with time?
BOOKLET:   pp 239-256
ILLUSTRATION OF:
+ a regression biplot based on reduced-rank regression (RDA)
+ a t-value biplot
_______________________________________________________________________________
FILE TYPE    |  FILE NAME    |         DESCRIPTION
-------------+---------------+-------------------------------------------------
 SPECIES     | mortality.dta | 11 causes of death (smrís) in 39 Dutch regions 
             |               |  in 4 periods (decades)
ENVIRONMENT  | explanat.dta  | period indicators (P1-P4), SES, 
             |               |  Urbanization (URB) and religion (CAT)
 PROJECTS    | stomca.con    | multiple regression project with model Period +
             |               |  Period.(SES+URB+CAT) to obtain the t-ratios 
             |               |  of Table 2 for Stomach Cancer (StomCa)
             | fig1.con	RDA  | project with model Period + Period.(SES+URB+CAT)
             |               |  from which figs.1 - 3 are constructed
             | fig4.con      | partial RDA project with model Period.SES, 
             |               |  adjusted for Period + Period.(UrB+CAT), to 
             |               |  obtain fig. 4
             | sesurbca.con  | RDA with main effects only (SES, URB,CAT) to 
             |               |  show that there are no high outliers in 
             |               |  these variables
-------------+---------------+-------------------------------------------------

Standardized mortality ratio's (smr's) due to 11 causes of death 
in regions

The value of OTHACC in period 1950 in region Zeeland has been modified
to the mean of other periods because of its high value due to the 1954
flood in Zeeland

Explanatory variables per region

P1 - P4 : periods
URB : URB (Urbanization) is an average over periods!
CAT : CAT (religion)   is an average over first 3 period
      (the fourth was missing)

In the data file, SES, URB and CAT are centered per period.

Kunst, A.E., Looman, C.W.N. & Mackenbach, J.P.(1990): Socio-economic 
mortality differences in the Netherlands in 1950-1984: a regional 
study of cause-specific mortality. Soc. Sci. Med., 31: 141-152.

Ter Braak, C.J.F. & Looman, C.W.N.(1994): Biplots in reduced-rank
regression. Biom. J., 36: 983-1003.