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As the 2dF Galaxy Redshift Survey and Sloan Digital Sky Survey move toward completion, it is time to ask what the next generation of survey of large-scale structure should be. I discuss some of the cosmological justifications for such surveys and conclude that surveys at z=3 offer a critical advantage in their ability to access linear-regime clustering at scales smaller than any current survey and even the CMB. I discuss a possible implementation of such a survey and highlight some of the potential science return.
Daniel J. Eisenstein (Thu,) studied this question.