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spec: Thereafter , students must maintain contact with advisors in the College of Sciences and Mathematics for information about taking the appropriate courses and guidance during the application process to the professional schools . The key theoretical difference is that neoclassical economists use a model that is only partially dynamic . Such a move he feels will strengthen the hand of the generals , not imperil them . However , scientists must come up with a way to do that using the mission 's existing scientific instruments , said NASA astrobiologist and Phoenix co-investigator Chris McKay . To be admitted to the program and to continue in it , students must maintain an above-average academic standing . Nonetheless , economic life has continued to thrive , and societies have developed alternative modes of governance based on norms and codes of behavior among firms and workers and through enforcement mechanisms such as arbitration . The Postal Service has indicated that the need for the 2006 rate case is necessitated by the escrow established by the Postal CSRS Funding Reform Act and that without access to the escrow , rates must rise to compensate . Instead , courts must focus on the precise law function reposed in them in such circumstances , which is to construe and enforce the meaning and thrust of the contract of the parties , not to purify their efforts " ( Northwest Gen. Corp. v Wellington Adv . Second , companies must manage the issue rather than just the litigation by coordinating the legal , government-affairs and public-relations response . The anomalies suggest that the units are more continuous and extensive than seen by geologic mapping . `` We confront the class with a problem - for example , '' What killed off the dinosaurs ?