Outline
- Define the problem;
- History of development banking;
- Analytical model;
- Case studies of France and Mexico.
Beatriz Armendariz de Aghion
Financial institution, that satisfy following properties:
There is one project, that yields return \( R\) with probability \( p\) if completed;
Co-financing requires to acquire expertise for all participants investing into the project;
Probability of success \( p\) depends on monitoring from all the banks involved in financing (\(p=m_1+m_2\)).
Each project requires total sink cost \( K\). In two bank cases, each of them provide \( \frac{K}{2}\);
Monitoring for each bank is denoted by \( m=\{\underline{m},\overline{m}\}\);
Monitoring assumed to incur cost \(d\) to the bank, with \(d(\underline{m})=0\) and \(d(\overline{m})=c(\mu)\), where \(\mu\leqslant 1\) - share of transmitted expertise to the bank. If bank itself acquired expertise, i.e. \(\mu=1\), cost is \(c(1)=0\). Assume \(c'<0\);
Acquisition of expertise requires to provide non-monetary effort from bank manager. I.e. to acquire expertise with probability \(e\), manager must incur \(g(e)\), where \(g'(e)>0,\, g''(e)>0\). Probability to start the project in two bank case is thus \(e=1-(1-e_1)(1-e_2)\). For calculations author assumes \(g(e)=\gamma e^2\), \(\gamma\gg 0\);
Expertise itself is source of proprietary knowledge to the bank manager. He values it at \(B(1-\mu)\);
Expertise cannot be described ex-ante, banks cannot bargain over \(e\) or \(\mu\) in advance.
\[ U_i=(1-(1-e_i)(1-e_j))p(m_i,m_j)\frac{R}{2}+e_i(1-e_j)B(1-\mu_i)-\frac{K}{2}-c(\mu_i)-g(e_i) \]
Assume expertise is non-rival good that is automatically and costlessly transmit to the entire financial system. Then symmetric Nash equilibrium will be \(\hat{e}_1=\hat{e}_2=\frac{\overline{m}R}{2\gamma+\overline{m}R}\);
Compared to social optimum \(e^\ast=\frac{\overline{m}R}{\gamma+\overline{m}R}>\hat{e}\), it can be seen there is underinvestment of expertise;
This results arise due to strategic substitability of the \(e_1\) and \(e_2\).
Consider manager of the bank that acquired expertise can choose optimal level of \(\mu\) to be transmitted;
Ex-post social optimum of \(\mu^\ast\) will be achieved by optimizing:
\[ \max_{\mu} (\overline{m}+m_2)R+B(1-\mu)-K-c(\mu)\\ \text{s.t.}\begin{cases} &m_2=\overline{m},\, \text{iff } (\overline{m}+\overline{m})\frac{R}{2}\geqslant c(\mu),\\ &m_2=\underline{m}, \, \text{otherwise}. \end{cases} \]
\(\mu=max(\mu^\ast, \overline{\mu})\)
Ex-ante \(e^\ast\) is then given by:
\[ e^\ast=arg\max_e (1-(1-e)^2)(2\overline{m}R+B(1-\mu^\ast))-g(e)=\frac{\overline{m}R+\frac{B}{2}(1-\mu^\ast)}{\gamma+\overline{m}R+\frac{B}{2}(1-\mu^\ast)}. \]
\[ \max_{\mu} (\overline{m}+m_2)R+B(1-\mu)-K\\ \text{s.t.}\, m_2=\overline{m},\, \text{iff } (\overline{m}+\overline{m})\frac{R}{2}\geqslant c(\mu); \]
\[ \max_{e_i}(1-(1-e_i)(1-e_j))2\overline{m}\frac{R}{2}+e_i(1-e_j)B(1-\overline{\mu})-g(e_i); \]
In decentralized system, there is potentially less information transmission of expertise;
Assuming information transmission is the same, there is underinvestment in expertise;
However, undertransmission of expertise mitigate underinvestment. Risk of concealing expertise may lead managers to overinvest (depend of \(B\)).
Suppose government subsidize the bank to finance certain industries;
Condition to invest into new industry will be:
\[ \overline{p}\frac{R_0}{2}-\frac{K_0-\Delta K}{2}+B_0 < (2\overline{m})\frac{R}{2}-\frac{K-\Delta K}{2}+B(1-\mu)-g(\hat{e}); \]
What if bank can undertake project alone, while taking the risk \(\sigma< \infty\)?
Co-financing still occur iff:
\[ \Pi^{nc}=R-K+B-\sigma<\Pi^{c}=R-K+B(1-\mu); \]
Suppose bank 1 owns \((1-\alpha)\) share in bank 2;
Profit of the bank 2 will be:
\[ \Pi=\alpha(2\overline{m})\frac{R}{2}-\alpha\frac{K}{2}+B(1-\overline{\overline{\mu}}); \]
Contrary to intuition transmission \(\overline{\overline{\mu}}<\overline{\mu}\);
Co-ownership will also negatively affect incentive to acquire expertise.
Credit National acquire substantially more expertise than Nacional Financiera;
Both were established by respective governments (and supported by them) to provide long term finance, among other things;
Credit National had three requirements for government support:
Credit National had also very dispersed ownership. The government encouraged co-financing known as "Fonds Mobilisables";
On other hand, Nacional Financiera were far less specialized and had to perform other functions;
Framework of co-financing the new industries was built upon acquisition and transmission of expertise;
Competitive Nash is generally underinvest in expertise compared to social optimum;
Under laissez-faire system, undertransmission of expertise occur that can alleviate underinvestment problem;
Joint ownership may have adverse effect on transmission of expertise.