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The authors examine facilitative aspects of field research with deviant Street populations. Based on the authors' research with the homeless and with male Street prostitutes, the facilitative aspects include access to settings, social relationships, acquisition of information, and the maintenance of researcher interest. The authors argue that in each of these aspects street deviants may in some ways be easier to study than other populations. The paper concludes with suggestions for maximizing the efficiency and quality of fieldwork with specific deviant populations. [ABSTRACT FROM AUTHOR]

Some macroecologists study population characteristics using a single variable, while others specify a system of interrelated variables. The purpose of this paper is to offer an ecological model which is theoretically appropriate and correctly bounded. Based on population (P), information (I), space (S), technology (T), organization (O), and level of living (L), or PISTOL, it is argued that the addition of two variables to the most famous ecological model (POET), namely L and I correctly bounds the POET model since each component is theoretically important. [ABSTRACT FROM AUTHOR]