social sphere with the efficiency of a market economy 
(Ludz, 1977). 
2  MATERIALS AND METHODS 
This study is focused on the economic development 
of  the  countries  of  the  German  world  which 
comprises German-speaking countries and countries 
are  exposed  to  the  German  institutions  and  culture. 
The study does not include the American countries of 
German  migration,  in  which  the  influence  of  the 
culture and institutions of their former metropolises is 
more  significant,  and  the  former  German  colonies, 
which practically did not inherit the institutions of the 
German Empire and gained independence from other 
countries,  and  data  for  the  colonial  period  of  their 
relations with Germany have not been found.  
The  features  of  the  policy  of  economic 
development  and  their  results  in  the  historical 
retrospective of 1850-2020 are under study. 
A feature of the research methodology is the use 
for  assessing  economic  development,  besides  the 
usual indicators of economic growth (growth rates of 
real GDP), also indicators of  stability (risks) of this 
development - the standard deviations (here and after 
SD)  of  the  growth  rates  of  real  GDP.  The  risk 
assessment  period  is  defined  as  the  economic  cycle 
from  the  first  year  of  the  start  (or  acceleration)  of 
economic growth to the last year of the recession (or 
slowdown) in Germany. This approach allows us to 
assess  the  quality  of  economic  decisions  and  their 
implementation  within  the  specific  culture  of  the 
German world. 
For the purposes of analysis, economic cycles are 
combined into four historical periods: 
  imperial period - 7 cycles - until 1919; 
  period of the Weimar Republic and the Third 
Reich - 3 cycles - until 1946; 
  the period of division into two states (FRG and 
GDR) - 5 cycles - until 1990; 
  the period of united Germany - 3 cycles - until 
2020. 
Within  this  approach,  the  policy  of  economic 
development is considered to be as progressive when 
the  subsequent  period,  in  comparison  with  the 
previous  one,  has  a  higher  rate  of  growth  of 
macroeconomic  indicators  and  a  lower  rate  of  risk 
(SD).  On  the  contrary,  decreasing  in  growth  and 
increasing in risks are associated with the regressive 
policy of economic development. A mutual decline in 
growth  rates  and  risks  is  the  indicator  of  the 
conservative policy of economic development, and in 
the case of growth, it is aggressive. 
The  index  of  coincidence  of  the  development 
policies of Germany with the countries of the German 
world is calculated by the formula (1). 
 
IC  M  O N  100
⁄
%, 
(1) 
 
where: 
IC  is  an  index  of  coincidence  of  development 
policies, for convenience on the percentage, 
N is the total number of studied periods (economic 
cycles), 
M is the number of coincidences of development 
policies, 
O is the number of opposite development policies. 
This  approach  is  theoretically  substantiated  in 
earlier  studies  by  the  authors,  which  shows  the 
correlation between culture and institutional models, 
which  is  confirmed  by  econometric  studies  of 
economic  development  (Savelyev,  2015;  Savelyev, 
2020; Savelyev et al., 2020a, 2020b; Savelyev et al., 
2021a,  2021b,  2021c,  2021d).  Data  sources  were 
works  (Maddison,  2008;  Bolt,  van  Zanden,  2014; 
World Bank, 2019; TED, 2020). 
Information base  for  the  analysis  of  data  on  the 
Russian  Empire  –  Nominal  GDP  historical  series 
(Dincecco,  2013).  This  source  contains  data  on 
nominal GDP. For correct comparison for the period 
1900-1913  according  to  (Maddison,  2008),  the 
average annual inflation index was evaluated and the 
values of nominal GDP reduced by  this  index  were 
obtained. This indicator can be considered the closest 
analogue of real GDP. Actual inflation by years may 
differ significantly, but for the purposes of this work, 
longer periods than a year are studied, and deviations 
of  real  GDP  from  the  calculated  one  due  to  the 
deviation of the actual annual inflation index from the 
average annual level are leveled, which allows us to 
calculate growth data reduced by the average annual 
inflation nominal GDP comparable to real growth.  
3  RESULTS AND DISCUSSION 
The evaluation of the development policy during the 
periods  of  certain  economic  cycles  in  the  studied 
countries  is  presented  in  Table  1.  Analysis  of  the 
evaluation  of  the  coincidences  of  policies  and 
opposite policies in these periods is made in Table 2.