36063
The backward nature of expectation formulation and the resultant systematic errors made by agents ( see Cobweb model ) was unsatisfactory to economists such as John Muth , who was pivotal in the development of an alternative model of how expectations are formed , called rational expectations .
 person: Cobweb; person: John Muth
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Cobweb, John Muth 
Answer:
 person: Cobweb; person: John Muth