I got about this far in the article before realizing the author simply has no clue:
"Some of these tools are quite sophisticated. One is cross-cultural studies, particularly in sociology and anthropology. These can include studies in epic story telling among certain peoples in the Balkans and parts of Africa. Another is economic modeling, including studies of peasant unrest and class tensions, and shifting socio-economic stresses with new urban developments, and geographical studies. There are also a host of psychological and medical studies into everything from the nature of memory to the various genetic mutations of the plague. And statistics. Always hosts of statistics of raw data....
Historical Jesus historians use the same tools, but the problem is they dont have any on-the-field known facts to start with. They have lots of stories and treatises (a real mix of church rules, fiction, theology, myth, real names and places) but the problem is to sift through that data to find out what is really a fact of history and what is not. So instead of using those historical tools to analyse facts (they dont know what the facts of Jesus life are yet) they mis-use those tools by applying them to unsubstantiated story narratives thinking that by doing so the conceptual tools will somehow perform more like the archaeologists trowel and dig up some historical facts.
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Jesus research uses sociology, statistics, psychological research, archaelogy, anthropology, and much, much more, with often excellent results. For example, Baukham recently incorporated psychological research on memory in his investigation of the transmission of the Jesus tradition (as well as a statistical analysis of names from using Lexicon of Jewish Names in Late Antiquity as a data set). Examinations on the nature of religious movements (how they compare with other religious groups, how they grow, are formed, etc) are all over Jesus research. Literary studies abound, and I have cited several on this thread.
Again, you would be much better served reading information on the field by people who have some idea of what they are talking about.