gated and otherwise restricted communities in the hopes of gaining an interview with a sampled unit.

Recommendation 1-7: Research is needed on the cost implications of nonresponse and on how to capture cost data in a standardized way.

These “cost” data may be based on proxy variables (such as total interviewer hours per case or other measures of effort), but at a minimum it would be useful if these or similar aggregate cost measures were routinely published. Cost information is needed if researchers are to make informed decisions about whether additional efforts to combat nonresponse are worth the cost.

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