@article{WACHTER:1988:AGGRAP:10.1080/0032472031000143606,
   AUTHOR = {Wachter, K.W.},
    TITLE = {Age group growth rates and population momentum},
  JOURNAL = {Population Studies},
   VOLUME = {42},
   NUMBER = {3},
     YEAR = {1988},
    PAGES = {487--494},
       ID = {info:doi/10.1080/0032472031000143606},
 ABSTRACT = {Samuel Preston has asserted in {\it Population Studies} that the
             average of the period age-group growth rates of a population
             averaged up to the mean generation length is a close approximation
             to the intrinsic rate of natural increase. This note shows that
             this claim is not true in general and considers what conditions
             make it true in special cases. These arguments lead to a
             reconsideration of population momentum, in particular to a study of
             the existence of a growth-free initial segment of the age pyramid
             of a population in transition to stationarity.},
   }

        

@article{WACHTER:1988:DBM,
   AUTHOR = {Wachter, K.W.},
    TITLE = {Disturbed by meta-analysis?},
  JOURNAL = {Science},
   VOLUME = {241},
      DAY = {16},
    MONTH = {September},
     YEAR = {1988},
    PAGES = {1407--1408},
       ID = {info:doi/10.1126/science.3420397},
   }

        

@article{WACHTER:1988:SXVATC:10.1086/166457,
   AUTHOR = {Wachter, K.W. and Strauss, M.A. and Filippenko, A.},
    TITLE = {Soft X-ray variability and the covering fraction of active galactic
             nuclei},
  JOURNAL = {Astrophysical Journal},
   VOLUME = {330},
   NUMBER = {3},
     YEAR = {1988},
    PAGES = {91--104},
       ID = {info:doi/10.1086/166457},
 ABSTRACT = {A model to explain the observed soft X-ray variability to some low-
             luminosity Seyfert 1 galaxies is developed. The variability is due
             to changes in the covering fraction of the central source as broad-
             line clouds move across our line of sight. A formalism is developed
             which is used to demonstrate how analysis of a soft X-ray light
             curve can provide three important quantities: the radius of the
             X-ray emitting region, the radius of a typical broad-line cloud,
             and the electron density in the cloud. It is shown that the results
             are rather insensitive to the assumed radial dependence of the
             surface brightness of the source, but are quite sensitive to a
             large dispersion in cloud sizes.},
   }

        

@article{DAVID:1988:CPASEO,
   AUTHOR = {David, Paul and Mroz, T. and Sanderson, W. and Wachter, K.W. and
             Weir, D.},
    TITLE = {Cohort parity analysis: Statistical estimates of the extent of
             fertility control},
  JOURNAL = {Demography},
   VOLUME = {25},
    MONTH = {May},
     YEAR = {1988},
    PAGES = {163--188},
      URL = {http://www.jstor.org/pss/2061287},
 ABSTRACT = {Cohort parity analysis (CPA) is a method for indirect measurement
             of the extent and timing of the adoption of fertility control
             within marriage. It uses information on the parity distribution of
             a cohort of women of specified marriage ages and durations. A
             multinomial model of parity provides a convenient framework for the
             computation of distributional parameters describing the extent to
             which marital fertility control has been accepted and
             characterizing the way control has been used within specific
             durations of marriage. This leads to a pair of easily implemented
             formulas for upper- and lower-bound estimates of the expected
             proportion of the population ever controlling and the distribution
             of controllers by parity. The power of CPA is illustrated, using
             census data for currently married couples in Dublin, Belfast, and
             other county boroughs of Ireland in 1911.},
   }