NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

The Vanishing Harberger Triangle

Hans-Werner Sinn

NBER Working Paper No. 3225 (Also Reprint No. r1642)*
Issued in October 1991
NBER Program(s):   PE

The paper presents a trapped equity model, but instead of studying how taxes affect

corporate decisions when a sufficient amount of equity is already in the trap, it asks the

question how does the equity get there. To be more specific, the paper analyzes how the

double taxation of dividends affects the growth of a corporation that starts with no equity

capital. One conclusion is that dividend taxes are distortionary before they are paid, but

not when they are paid. Once the firm is in a stage of maturity where it pays dividends and

dividend taxes, tax neutrality prevails. Thus the true intersectoral distortion resulting from

corporate taxation is negatively correlated with the measured tax burden, and it is lower,

the higher the distortion which estimates of Harberger type would predict. Another

conclusion is that the King-Fullerton cost of capital formulae are not applicable in the case

of immature firms. These formulae are based on the assumption that firms distribute their

profits from marginal investment projects as dividends. However, immature firms strictly

prefer a reinvestment to a distribution of profits. The reinvestment changes the cost of

equity capital, and typically this cost is higher than a hasty application of the

King-Fullerton formulae would predict.

*Published: Journal of Public Economics, Vol. 45, pp. 271-300, (1991). Edited by A.B. Atkinsona and N.H. Stern, UK.

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