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The Selective Control Design Refers to Combining Various Quasi-Experimental Designs

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Essay

The selective control design refers to combining various quasi-experimental designs to control the threats to internal validity that are thought to be the most viable to a particular evaluation. Suppose that a college instituted a program to help retain freshmen so that a greater proportion re-enrolled for the sophomore year than in the past. The obvious comparison is between the re-enrollment rates of the current freshmen and the previous year's freshmen. What threats to internal validity weaken the conclusions that one could draw from such a comparison? Expand on this basic design, seeking to control at least some of the threats to the internal validity of the design.


Definitions:

Angel

A wealthy person who funds a new business, typically in return for convertible debt or a share in the company's equity.

Pre-money Valuation

The value of a company as estimated before the injection of new capital or investments.

Post-money Valuation

Refers to a company's valuation after external financing and/or capital injections are added to its balance sheet.

Outside Investment

Funds acquired from external sources, such as venture capitalists or angel investors, to finance the operations or growth of a business.

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