scholarly journals PARTLY SUFFICIENT STATISTICS AND COMPLETE CLASS THEOREMS FOR STATISTICAL DECISION PROBLEMS WITH NUISANCE PARAMETERS

10.5109/13094 ◽  
1975 ◽  
Vol 16 (3/4) ◽  
pp. 47-53
Author(s):  
Akimichi Okuma
Keyword(s):  
Decision Problems ◽  
Nuisance Parameters ◽  
Statistical Decision ◽  
Complete Class ◽  
Sufficient Statistics

scholarly journals Group Polarization in a Model of Information Aggregation

2015 ◽  
Vol 7 (4) ◽  
pp. 202-232 ◽  
Author(s):  
Nicolas Roux ◽  
Joel Sobel
Keyword(s):  
Information Aggregation ◽  
Decision Makers ◽  
Decision Problems ◽  
Rational Decision ◽  
Group Polarization ◽  
Statistical Decision ◽  
Empirical Regularity

Experiments identify the empirical regularity that groups tend to make decisions that are more extreme, but in the same direction as the tendency of individual members of the group. We present a model of information aggregation consistent with these findings. We assume individuals and groups are rational decision makers facing monotone statistical decision problems where groups and individuals have common preferences, but groups have superior information. We provide conditions under which the distribution of the optimal actions of the group is more variable than the distribution of actions taken by individuals. (JEL D71, D83)

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