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Papers by Magnus Hoffmann

SSRN Electronic Journal, 2012

This paper contributes to resolving the puzzle that in practice most countries use ad valorem (co... more This paper contributes to resolving the puzzle that in practice most countries use ad valorem (corporate income) taxation, while a large part of the tax competition literature views business taxes as unit (wealth) taxation. We point to the dual role corporate taxation plays in attracting mobile capital, on the one hand, and in absorbing economic rents, on the other hand. In contrast to the previous literature, we show (i) that detrimental tax competition may be less severe in a system of ad valorem taxes than in a system of unit taxes and (ii) that ad valorem taxation may be the equilibrium outcome in a decentralized world where countries decide themselves on the tax system. Interestingly, the decentralized choice of the ad valorem system may be a prisoner's dilemma since the countries' welfare may be higher if they choose unit taxes.

In the following, we examine a market of a digital consumption good with monopolistic supply. In ... more In the following, we examine a market of a digital consumption good with monopolistic supply. In this market, it is the ability of the consumer to bypass (”crack”) the copy-protection of the monopolist which induces a lower price of the digital good, compared to an uncontested monopoly (textbook case). We analyze the complex relationship between the cracking efforts of the

Games and Economic Behavior, 2012

This paper examines simultaneous versus sequential choice of effort in a twoplayer contest with a... more This paper examines simultaneous versus sequential choice of effort in a twoplayer contest with a general contest success function. The timing of moves, determined in a pre-play stage prior to the contest-subgame, as well as the value of the prize is allowed to be endogenous. Contrary to endogenous timing models with an exogenously fixed prize the present paper finds the following. (1) Players may decide to choose their effort simultaneously in the subgame perfect equilibrium (SPE) of the extended game, (2) the SPE does not need to be unique, (3) in particular, there is no unique SPE with sequential moves if costs of effort are exclusively endogenously determined, (4) if the unique SPE is sequential play, the win probability in the NE is in no way crucial for the determination of an endogenous leadership, (5) and symmetry among players does not rule out incentives for precommitment to effort locally away from the Nash-Cournot level

Social Choice and Welfare, 2009

If property rights to consumption goods are insecure, the incentives to trade in a barter economy... more If property rights to consumption goods are insecure, the incentives to trade in a barter economy are reshaped. In a pure exchange economy, we examine the case where two contestable consumption goods are vital to two agents and initial endowments follow a binary distribution. In line with the existing literature, we examine in a two-stage game how the equilibrium security of claims to property is determined. We find that, in equilibrium, two different regimes emerge, depending on the exogenous preference and appropriationeffectiveness parameters: Peaceful coexistence and trade and appropriation, with the former regime strictly Pareto-dominating the latter regime.

SSRN Electronic Journal, 2012

This paper contributes to resolving the puzzle that in practice most countries use ad valorem (co... more This paper contributes to resolving the puzzle that in practice most countries use ad valorem (corporate income) taxation, while a large part of the tax competition literature views business taxes as unit (wealth) taxation. We point to the dual role corporate taxation plays in attracting mobile capital, on the one hand, and in absorbing economic rents, on the other hand. In contrast to the previous literature, we show (i) that detrimental tax competition may be less severe in a system of ad valorem taxes than in a system of unit taxes and (ii) that ad valorem taxation may be the equilibrium outcome in a decentralized world where countries decide themselves on the tax system. Interestingly, the decentralized choice of the ad valorem system may be a prisoner's dilemma since the countries' welfare may be higher if they choose unit taxes.

In the following, we examine a market of a digital consumption good with monopolistic supply. In ... more In the following, we examine a market of a digital consumption good with monopolistic supply. In this market, it is the ability of the consumer to bypass (”crack”) the copy-protection of the monopolist which induces a lower price of the digital good, compared to an uncontested monopoly (textbook case). We analyze the complex relationship between the cracking efforts of the

Games and Economic Behavior, 2012

This paper examines simultaneous versus sequential choice of effort in a twoplayer contest with a... more This paper examines simultaneous versus sequential choice of effort in a twoplayer contest with a general contest success function. The timing of moves, determined in a pre-play stage prior to the contest-subgame, as well as the value of the prize is allowed to be endogenous. Contrary to endogenous timing models with an exogenously fixed prize the present paper finds the following. (1) Players may decide to choose their effort simultaneously in the subgame perfect equilibrium (SPE) of the extended game, (2) the SPE does not need to be unique, (3) in particular, there is no unique SPE with sequential moves if costs of effort are exclusively endogenously determined, (4) if the unique SPE is sequential play, the win probability in the NE is in no way crucial for the determination of an endogenous leadership, (5) and symmetry among players does not rule out incentives for precommitment to effort locally away from the Nash-Cournot level

Social Choice and Welfare, 2009

If property rights to consumption goods are insecure, the incentives to trade in a barter economy... more If property rights to consumption goods are insecure, the incentives to trade in a barter economy are reshaped. In a pure exchange economy, we examine the case where two contestable consumption goods are vital to two agents and initial endowments follow a binary distribution. In line with the existing literature, we examine in a two-stage game how the equilibrium security of claims to property is determined. We find that, in equilibrium, two different regimes emerge, depending on the exogenous preference and appropriationeffectiveness parameters: Peaceful coexistence and trade and appropriation, with the former regime strictly Pareto-dominating the latter regime.