2.1. Indices of Central Bank Independence (CBI)
2.1.1. Indices of Legal CBI
Relevant elements of the central bank's law are aggregated into indices of legal
independence by several researchers. Nearly all these papers are devoted to central
banks in developed economies. First empirical work on CBI in twelve industrial
countries was presented by Bade and Parkin (1988) (BP). They focus on three
elements affecting CBI: the relationship between government and bank in the
formulation of monetary policy, the procedure for appointing the board of the bank
and the financial relations between the bank and the government. First two features
characterise political independence (defined as the capacity to choose policy goals),
the last one describes financial or budgetary independence. Political independence is
assumed to be highest if the bank is the final policy authority, there is no government
official in the board and more than half of the bank board members are appointed
independently of the government. The smaller is the number of these attributes, the
lower is political independence. The resulting index can take integer values from 1
(zero attributes) to 4 (all three attributes). Thus, equal weights are attached to all
variables.
Alesina (1988, 1989) presents similar index of political independence, extending
their sample to seventeen industrial economies. Numerical values of these two indices
are identical for all countries in the BP sample, except for Italy which was given lower
value.
Grilli, Masciandaro and Tabellini (1991) (GMT) focus on political and economic
independence of the Central Bank. The political independence, defined as the capacity
of the monetary authority to choose the final goal of policy, is influenced by three
elements: relationship between government and bank in the formulation of monetary
policy, the procedure for appointing the board and the formal goal of the bank with
respect to monetary policy. These elements are operationalised by eight criteria:
appointment procedure for the high officials of the bank (the governor and the board),
length of their term in office, participation of the government representative in the
board, government approval of monetary policy, legal provision strengthening the
bank's position against the government in case of conflict and statutory obligations to
maintaining price stability. GMT index of political independence is a sum of these
equally weighted characteristics. Authors define economic independence as the
capacity to choose the instruments of monetary policy. This aspect of independence is
assumed to be affected by legal constraint on central bank's lending to the government
and the location of the banking supervision. The bank is assumed to be more
independent if the direct credit facility is of limited amount, not automatic, temporary
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