Titlebook: Evaluating R&D Impacts: Methods and Practice; Barry Bozeman,Julia Melkers Book 1993 Springer Science+Business Media New York 1993 evaluati

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The Temporal Dimension of R&D Evaluation: Incorporating Spin-Off Benefitsealized only after an extended development period during which planned and/or unanticipated benefits may spin off. These temporal aspects complicate the measurement of the R&D impacts and necessitate periodic monitoring, sometimes covering an extended time period, to identify the full range of R&D impacts.

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,Die ?ltesten Zirkone: Zeugen aus dem Hades,be used to relate events to theory (Eisenhardt, 1989; Yin, 1989), it is difficult to generalize from the findings from one setting (Cook & Campbell, 1979). This makes it difficult to identify and differentiate the use of case study separate from the other methods listed above.

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