Paleolinguistics
They have established regular phonological correspondences, observed morphological similarities, and reconstructed a proto-language in accordance with the accepted methodology.Into that category fall proposals based on mass comparison, a technique in which relationships are postulated on basis of sets of words resembling each other in sound and meaning, without establishing phonological correspondences or carrying out a reconstruction.Other linguists who may be considered paleolinguists due to their advocacy of long-range hypotheses include: John Bengtson, Knut Bergsland, Derek Bickerton, Václav Blažek, Robert Caldwell, Matthias Castrén, Björn Collinder, Albert Cuny, Igor Diakonov, Vladimir Dybo, Harold Fleming, Eugene Helimski, Otto Jespersen, Frederik Kortlandt, Samuel E. Martin, Roy Andrew Miller, Hermann Möller, Susumu Ōno, Holger Pedersen, Alexis Manaster Ramer, G.J.Ramstedt, Rasmus Rask, Jochem Schindler, Wilhelm Schmidt, Georgiy Starostin, Morris Swadesh, Henry Sweet, Vilhelm Thomsen, Vladimir N. Toporov, Alfredo Trombetti, and C.C.For example, evolutionary biologist Mark Pagel has written an article titled Ultraconserved words point to deep language ancestry across Eurasia that combines advanced novel statistical modeling techniques and computational methods with paleolinguistic arguments to give theoretical justification to the search for features of language that might be preserved across wide spans of time and geography.