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Table 1 Table of model parameters/variables

From: Strategic interaction between institutional investors and supervision department: a theoretical analysis of low-price collusion in SBIC

Parameter/variable

Meaning

\(x\)

Proportion of LIIs adopting strategy of rapacious quotation,\(0 \le x \le 1\)

\(y\)

Proportion of SMIIs adopting strategy of imitative quotation,\(0 \le y \le 1\)

\(z\)

Proportion of SD adopting strategy of tough supervision,\(0 \le z \le 1\)

\(p_{1}\)

Price corresponding to illegal quotation of the institutional investor, including rapacious quotation and imitative quotation

\(p_{2}\)

Price corresponding to fair quotation of LIIs

\(p_{3}\)

Price corresponding to independent quotation of SMIIs

\(p_{L}\)

Equilibrium price of new stocks in the secondary market, and \(p_{L} > p_{3} > p_{2} > p_{1}\)

\(m\)

Sensitivity of issuance price to \(x\),\(m > 0\)

\(k\)

Culling rate of high-price culling rule,\(0 < k < 1\)

\(\alpha\)

Allocation rate for new stock of institutional investors,\(0 < \alpha < 1\)

\(\eta\)

The ratio of SMIIs to LIIs in terms of financial budget

\(M_{1}\)

Penalty for illegal LIIs under tough supervision, \(M_{1}\) is greater than the incremental benefits of LIIs’ illegal quotations

\(M_{2}\)

Penalty for illegal SMIIs under tough supervision, \(M_{2}\) is greater than the incremental benefits of SMIIs’ illegal quotations

\(C\)

Additional cost of SD under tough supervision

\(I_{1}\)

rewards of SD under tough supervision

\(I_{2}\)

rewards when SD supervises lightly but illegal quotations are not exposed

\(\lambda\)

Sensitivity of exposure ratio to the proportion of the illegal quotation group,\(0 < \lambda < 1\)

\(N\)

Penalties by superior when SD supervises lightly and there are illegal quotations being exposed