106-Research-and-Policy.Rmd

# Research and Policy 

What makes a model good? Fit for purpose? 

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Macdonald's model was put to the test in a field trial, conducted from September 1966 through February 1969 in the southern part of the Kankiya District of the Katsina Emirate in the North Central State of Nigeria [@NajeraJA1974CriticalReview]. A major conclusion was that the failures were *...in a considerable part due to the deficiencies of the model.*  

Some of those discrepancies were addressed through the development of a new model developed for a new field trial that was conducted in Garki, Nigeria [@DietzK1974GarkiModel]. 

## Temporal Epochs

## Information and Decisions

## Inference 

## Imputation