A further factor that may affect the number of cases is the conceptual framework with which we are working. For example, if social class was an important concept in the study it would be necessary to include cases from each of the different social classes. The number of cases would depend on how social class was conceptualized and on how many class categories this conceptualization included (e.g. just middle class and working class, or a more refined class classification that includes upper class and various classifications within the middle and working classes).
We could go on forever and check things out under any number of different conditions. In the end we must make judgements about likely variations and have good reasons for expecting that these different conditions might affect the patterns. We also must be guided by what is practical within the constraints of time, money and access to relevant cases. The critical thing is to select the most strategic cases to test our propositions rather than aiming for a large number of cases.
Case screening
The strategic selection of cases involves selecting cases because they have particular characteristics. If we want to know whether centralized or self-governing school have better educational outcomes we need to know which school have which system. We might also need to know, for selection purposes, how long a school has had a particular system. We might eant to select schools that had good and poor educational outcomes. To do this we would need to have this information before the case selection process took place.
Strategic case selection can require considerable groundwork to identify the characteristics of a large number of cases in order to see which ones satisfy the criteria for selection. This process can be time consuming but is critical and must be built into time lines and budgets. Case screening may be done in any number of ways, depending on the type of case. A survey questionnaire, annual reports of an organization, archival records, databases or a wide range of other sources may yield the relevant screening information.
A further factor that may affect the number of cases is the conceptual framework with which we are working. For example, if social class was an important concept in the study it would be necessary to include cases from each of the different social classes. The number of cases would depend on how social class was conceptualized and on how many class categories this conceptualization included (e.g. just middle class and working class, or a more refined class classification that includes upper class and various classifications within the middle and working classes).
We could go on forever and check things out under any number of different conditions. In the end we must make judgements about likely variations and have good reasons for expecting that these different conditions might affect the patterns. We also must be guided by what is practical within the constraints of time, money and access to relevant cases. The critical thing is to select the most strategic cases to test our propositions rather than aiming for a large number of cases.
Case screening
The strategic selection of cases involves selecting cases because they have particular characteristics. If we want to know whether centralized or self-governing school have better educational outcomes we need to know which school have which system. We might also need to know, for selection purposes, how long a school has had a particular system. We might eant to select schools that had good and poor educational outcomes. To do this we would need to have this information before the case selection process took place.
Strategic case selection can require considerable groundwork to identify the characteristics of a large number of cases in order to see which ones satisfy the criteria for selection. This process can be time consuming but is critical and must be built into time lines and budgets. Case screening may be done in any number of ways, depending on the type of case. A survey questionnaire, annual reports of an organization, archival records, databases or a wide range of other sources may yield the relevant screening information.
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