This function calculates Blair and Lacy's l, a measure of concentration based on linear Euclidean distances. This function follows the presentation by Blair and Lacy 2000. The measure l-squared by Blair and Lacy is implemented as lsquared.
References
Blair, J., and M. Lacy. 2000. Statistics of Ordinal Variation. Sociological Methods & Research 28 (3): 251-280.