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Table 2 A comparison of coefficients on GDP per capita by IMR transformation

From: Are infant mortality rate declines exponential? The general pattern of 20th century infant mortality rate decline

Country

Years

Box-Cox

IMR transformation

λ = "Best Fit"

Log IMR transformation

λ = 0

 
  

Coefficient on GDP per capita

Coefficient on GDP per capita

Coefficient gap

Whole sample

 

-0.065 ***

-0.078 **

0.013

Australia

1921–1999

0.217 ***

-0.034 **

0.251

Austria

1947–1999

0.151 ***

0.079

0.072

Belgium

1900–1913

1918–1999

-0.070 ***

-0.09 **

0.02

Canada

1921–1999

-0.038 ***

-0.051 **

0.013

Denmark

1900–1999

-0.057 **

-0.06 **

0.003

Finland

1900–1999

-0.088 ***

-0.106 **

0.018

France

1900–1999

-0.084 ***

-0.11 **

0.026

Italy

1900–1999

-0.151 ***

-0.132 **

-0.019

Japan

1947–1999

-0.020 ***

0.026

-0.046

Netherlands

1900–1999

-0.023 ***

-0.004

-0.019

New Zealand

1947–1999

0.035

0.068 *

-0.033

Norway

1900–1999

-0.004

-0.046 **

0.042

Portugal

1940–1999

-0.366 ***

-0.233 **

-0.133

Spain

1908–1999

-0.127 ***

-0.154 **

0.027

Sweden

1900–1999

-0.062 ***

-0.062 **

0

Switzerland

1900–1999

-0.009

-0.031 **

0.022

UK

1900–1999

0.145 ***

-0.031 **

0.176

USA

1933–1999

-0.009

-0.009

0

  1. No mortality data are available for Belgium from 1914–1918. USA has IMR time series that is best fit as logarithmic. Bold coefficient gaps are for countries where coefficients are significant in both models.***p < 0.01, ** p < 0.05, *p < 0.10 for null that coefficient = 0.