PSEUDO-R2 MEASURES FOR SOME COMMON LIMITED DEPENDENT VARIABLE MODELS

Abstract. A large number of different Pseudo- R ² measures for some common limited dependent variable models are surveyed. Measures include those based solely on the maximized likelihoods with and without the restriction that slope coefficients are zero, those which require further calculations based on parameter estimates of the coefficients and variances and those that are based solely on whether the qualitative predictions of the model are correct or not. The theme of the survey is that while there is no obvious criterion for choosing which Pseudo- R ² to use, if the estimation is in the context of an underlying latent dependent variable model, a case can be made for basing the choice on the strength of the numerical relationship to the OLS- R ² in the latent dependent variable. As such an OLS- R ² can be known in a Monte Carlo simulation, we summarize Monte Carlo results for some important latent dependent variable models (binary probit, ordinal probit and Tobit) and find that a Pseudo- R ² measure due to McKelvey and Zavoina scores consistently well under our criterion. We also very briefly discuss Pseudo- R ² measures for count data, for duration models and for prediction-realization tables.     

IMPACT OF ANTI-APARTHEID SANCTIONS ON SOUTH AFRICA: SOME TRADE AND FINANCIAL EVIDENCE

Economic sanctions against South Africa presumably are intended to cause economic damage. Trade sanctions should induce the South African terms of trade to deteriorate, and investment sanctions should cause capital flight and cause the exchange rate to deteriorate. However, due to the nature of the South African economy and to certain policies of the South African government, these impacts may be difficult to achieve.     

Briefing Paper The Debate about Monetary Policy

The main implications from the discussion above are:

• 1. 

  If the PSBR affects the money supply it should also have a direct influence upon inflation.
• 2. 

  Our research indeed suggests that the PSBR is the root cause of inflation as well as the root cause of monetary growth.
• 3. 

  The government should therefore be less pre-occupied with M3 and lay even greater emphasis on the PSBR.
• 4. 

  It should avoid sinking its energies into money base control. At most some form of money base control is advisable as a precaution.
• 5. 

  To avoid any further money market disturbances the authorities should resort to a floating rate policy for MLR as was formerly the case.

     

Cost-Padding in Profit-Regulated Firms*

When entry into an industry is restricted, economic regulation of that industry is often directed at preventing existing firms from monopoly pricing behaviour. One form of such regulation is to set prices so as to control the level of profits earned by these firms. This paper briefly reviews the relevant economic literature and presents a model of the regulated firm in which such price-setting procedures provide an incentive to inflate costs above minimum levels. The welfare cost of this form of regulation can then exceed that occurring at the unconstrained monopoly outcome. The setting of air fares under the Two-Airline Policy and the regulation of natural gas in NSW are discussed in the context of this analysis.     

Liquidity,Reconstitution, and the Value of U.S. Treasury Strips

An apparent pricing anomaly exists in the market for U.S. Treasury strips: zero-coupon strips created from principal payments typically trade at significantly higher prices than otherwise identical zero-coupon strips created from coupon payments. In addition to documenting this phenomenon, this study demonstrates that differences in liquidity and differences in reconstitution characteristics explain much of this price variation.     

L'information financière stratégique: le cas des négociations collectives*

Résumé. Les auteurs analysent le comportement stratégique des entreprises en ce qui a trait à la diffusion publique de l'information financière dans 673 communications publiées avant, pendant et après quatre grèves syndicales au Canada. L'information financière, publiée dans la presse écrite au cours des périodes auxquelles les auteurs se sont intéressés, comportait des données quantitatives et qualitatives au sujet des entreprises échantillonnées. Le comportement stratégique suppose la désignation d'un acteur par un autre dans l'information communiquée. Les analyses ont révélé que la fréquence des communications était beaucoup plus élevée pendant les grèves et immédiatement avant qu'au cours d'autres périodes. Des techniques d'analyse de réseau ont été employées pour examiner les liens unissant sept groupes d'acteurs qui ont été désignés dans l'information communiquée. Les réseaux de communication d'information ont augmenté en densité au cours des grèves mais se sont décentralisés, L'analyse confirme l'hypothèse selon laquelle les interactions stratégiques dans l'information communiquée sont multilatérales et dynamiques. Il serait donc simpliste de chercher à modéliser la communication d'information financière dans le cadre de négociations collectives sous forme de joute bilatérale à laquelle se livrent les parties sur une période donnée. La gestion de la communication d'information dans ce contexte semble s'opérer dans une conjoncture économique et sociale complexe.     

Estimating the Benefits of Individual Retirement Accounts: A Comparison to Capital Gains Investments

This paper compares the benefits of investing funds in an IRA account to the benefits of investing funds in a long-term capital gains investment. The comparison is motivated because IRA funds, although they can be placed in a long-term capital gains account, are ultimately taxed at ordinary income tax rates. IRA funds cannot receive the favorable long-term capital gains tax treatment. Following previous work by Collins, gain factors are computed for IRA accounts vs. long-term capital gains accounts. In most cases the gain factors are larger than one, although much smaller than when the alternative investment is a typical savings account. Gains factors are, however, universally less than one for premature withdrawal of the IRA.     

EFFECTS ON INTEREST RATES OF IMMEDIATELY RELEASING FOMC DIRECTIVES

Prior to February 1994, the Federal Open Market Committee (FOMC) did not officially release its current Domestic Policy Directives to the public until after the next FOMC meeting, a lag of approximately 45 days. Thus, the public never knew the FOMC's latest decisions about short-run monetary policy. On 11 occasions between early 1989 and May 1993, however, the essence of the directives was "leaked" to the Wall Street Journal within one week of an FOMC meeting. This study tests Federal Reserve officials' original assertion that early release of directives would increase volatility in financial markets by creating announcement effects. The study finds some evidence of announcement effects in certain instances, but the assertion that an immediate release would "roil the markets" appears unfounded .