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Biomedical subjects

G W Lasker

Publications and source records attributed to G W Lasker.

At least 37 records · Page 2Linked to original sources
PubMed1978

Communality of surnames: a measures of biological interrelationships among thirty-one settlements in upper Val Varaita in the Italian alps.

The upper part of the Alpine valley of the Varaita (population about 1,596) has three communities situated in a triangle about 6 km on a side but divided into frazioni (clusters of houses) that form a "Y" along the road and river in the valley floor. The coefficient of relationship (Ri) based on the communality of surnames between pairs of frazioni and between pairs of the communities shows very high levels of interrelationship (up to 0.26 compared with 0.5 for brothers). It tends to be higher between frazioni of the same community than between communities. It is highest among five pairs of contiguous frazioni within 1 km of each other. It tends to be highest between frazioni of the community least influenced by tourism and migration. It is not dmonstrably affected by the division of one community into two parishes. It is about twice as high between contiguous communities as between the two communities with an intervening one. The high values represent the long history of the same surnames in the valley and the accumulation of relationship through high levels of valley endogamy.

Genetics, Medical↗
PubMed1978

Relationships among the Otmoor villages and surrounding communities as inferred from surnames contained in the current register of electors.

The interrelationships of 17 villages and a town near Otmoor have been investigated by means of the coefficients of relationships by isonymy: Ri = sigma(Si1Si2)/2N1N2 in which Si1 and Si2 are the respective frequencies of the ith surname in communities 1 and 2 and N1 and N2 are the respective sample sizes. The coefficients calculated from all adult males listed in the current registers electros range from 0 to over 0.008. The coefficient of relationship within the town and between the town and villages average 0.0005. Those between villages average 0.0007. The correlation between the coefficient of relationship by isonymy wth the frequency of marriages between parishes is +0.75 but this high correlation rests largely on a few very closely related pairs of parishes and largely on the contribution to Ri of relatively rare surnames. The method can easily be applied to wide surveys, and even to historic data, to explore the development of intercommunity relationships in the period since surnames became general.

Adult↗