| Citation | Efstathiou has a versatile record of achievement in extragalactic astronomy and cosmology. He was a pioneer in computer simulations of galaxy formation and large-scale structure; the so-called 'CDM' models, which he and his collaborators developed in great detail, became a benchmark against which all relevant data were compared. His calculations, with Bond, of how the anisotropy and polarisation of background radiation can discriminate among different models for the origin of cosmic structure, have provided a firm framework for interpreting and optimising microwave experiments. He spearheaded the first automated suvey of galaxy clustering, and is playing a leading role in exploring the 3-dimensional distribution of galaxies via redshift surveys. He has also contributed, both observationally and theoretically, to our understanding of individual galaxies. Efstathiou stand out from his contemporaries because of his powerful combination of computational, analytical, and observational skills. He has energetically deployed these skills on ambitious and well-judged projects, and is a respected international leader in the field. |