nep-net New Economics Papers
on Network Economics
Issue of 2017‒08‒13
three papers chosen by
Pedro CL Souza
Pontifícia Universidade Católica do Rio de Janeiro

  1. Competition and Networks of Collaboration By Roketskiy, Nikita
  2. Costly Information Acquisition, Social Networks and Asset Prices: Experimental Evidence By Halim, Edward; Riyanto, Yohanes Eko; Roy, Nilanjan
  3. Network Effects on Labor Contracts of Internal Migrants in China: A Spatial Autoregressive Model By Baltagi, Badi H.; Deng, Ying; Ma, Xiangjun

  1. By: Roketskiy, Nikita
    Abstract: I develop a model of collaboration between tournament participants in which agents collaborate in pairs, and an endogenous structure of collaboration is represented by a weighted network. The agents are forward-looking and capable of coordination. They value collaboration with others and higher tournament rankings. I use von Neumann-Morgenstern stable sets as a solution. I find stable networks in which agents collaborate only within exclusive groups. Both absence of intergroup collaboration and excessive intragroup collaboration lead to inefficiency. I provide a necessary and sufficient condition for the stability of efficient outcomes in winner-takes-all tournaments. I show that the use of transfers does not repair efficiency.
    Keywords: networks; tournaments
    JEL: C71 D85
    Date: 2017–07
  2. By: Halim, Edward; Riyanto, Yohanes Eko; Roy, Nilanjan
    Abstract: We design an experiment to study the implications of information networks for the incentive to acquire costly information, market liquidity, investors' earnings and asset price characteristics in a financial market. Social communication crowds out information production as a result of agent's temptation to free ride on the signals purchased by their neighbors. Although information exchange among traders increases trading volume, improves liquidity and enhances the ability of asset prices to reflect the aggregate amount of information in the market, it fails to improve price accuracy. Net earnings are higher with information sharing due to reduced acquisition of costly signals.
    Keywords: Asymmetric Information, Costly Information Acquisition, Experimental Asset Markets, Social Network, Uncertainty
    JEL: C92 D84 G10 G12 G14
    Date: 2017–08–07
  3. By: Baltagi, Badi H. (Syracuse University); Deng, Ying (School of International Trade and Economics, Beijing); Ma, Xiangjun (School of International Trade and Economics, Beijing)
    Abstract: This paper studies the fact that 37 percent of the internal migrants in China do not sign a labor contract with their employers, as revealed in a nationwide survey. These contract-free jobs pay lower hourly wages, require longer weekly work hours, and provide less insurance or on-the-job training than regular jobs with contracts. We find that the co-villager networks play an important role in a migrant's decision on whether to accept such insecure and irregular jobs. By employing a comprehensive nationwide survey in 2011 in the spatial autoregressive logit model, we show that the common behavior of not signing contracts in the co-villager network increases the probability that a migrant accepts a contract-free job. We provide three possible explanations on how networks influence migrants' contract decisions: job referral mechanism, limited information on contract benefits, and the "mini labor union" formed among co-villagers, which substitutes for a formal contract. In the sub-sample analysis, we also find that the effects are larger for migrants whose jobs were introduced by their co-villagers, male migrants, migrants with rural Hukou, short-term migrants, and less educated migrants. The heterogeneous effects for migrants of different employer types, industries, and home provinces provide policy implications.
    Keywords: contract, co-villager network, spatial autoregressive logit model, internal migrants
    JEL: O15 R12 J41
    Date: 2017–07

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