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In real estate the maxim for picking a piece of property is “location, location, location.” In elite interviewing, as in social science generally, the maxim for the best way to design and conduct a study is “purpose, purpose, purpose.” It's elementary that the primary question one must ask before designing a study is, “What do I want to learn?” Appropriate methods flow from the answer. Interviewing is often important if one needs to know what a set of people think, or how they interpret an event or series of events, or what they have done or are planning to do. (Interviews are not always necessary. Written records, for example, may be more than adequate.) In a case study, respondents are selected on the basis of what they might know to help the investigator fill in pieces of a puzzle or confirm the proper alignment of pieces already in place. If one aims to make inferences about a larger population, then one must draw a systematic sample. For some kinds of information, highly structured interviews using mainly or exclusively close-ended questions may be an excellent way to proceed. If one needs to probe for information and to give respondents maximum flexibility in structuring their responses, then open-ended questions are the way to go.

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This article uses three perspectives to explain the radical economic and state sector reforms undertaken in New Zealand starting in 1984. We interpret the reforms using a rational-comprehensive perspective, a garbage can perspective and a modified garbage can perspective identified in the work of John Kingdon. With New Zealand as an illustrative case, we explore the conditions under which radical reform is possible, the factors governing the adoption of reforms, and the impact on the reform process of a country's historical and cultural traditions. Our analysis emphasizes the import of a package of ready-made solutions, strong advocates (particularly a well-placed policy entrepreneur) who attach the solutions to a problem, and the existence of a 'window of opportunity' for adoption of the reforms. We conclude with a discussion of the implications of adopting reforms that run counter to a nation's long-established traditions.