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During gastrulation, a cascade of inductive tissue interactions converts pre-existing polarity in the mammalian embryo into antero-posterior pattern. This process is triggered by Nodal, a protein related to transforming growth factor-beta (TFG-beta) that is expressed in the epiblast and visceral endoderm, and its co-receptor Cripto, which is induced(More)
Based on the results of the OECD 2005 questionnaire on performance information, this article provides an overview of the development and use of performance measures and evaluations in the budget process across OECD countries. This trend is both widespread and long-term. However, questions remain about the real extent of change and if and how performance(More)
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