Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
There appears to be some confusion in the literature on asset-pricing models about the role of default-risk in short-selling and borrowing by consumers. For example, in the Sharpe-Lintner ([16] [9]) model it is usual to assume that all consumers are able to borrow or lend without restriction, at the riskless rate of interest. This assumption has been recognized to involve an inconsistency in the theory, because with personal borrowing there is always a positive probability of default with the S-L assumptions, so that the consumer's bond (as seen by any lender) is not a perfect substitute for the safe asset.