Grant amount：\2990000 （ Direct Cost: \2300000 、 Indirect Cost：\690000 ）

We conducted both theoretical and experimental studies on queuing games in which customers strategically choose their arrival time at the service window.
First, we constructed and analyzed theoretically a discrete time model with general service time distribution for queueing games, which had previously been treated as a continuous one. Next, laboratory experiments were conducted to examine the theoretical results, and it was found that the actual observed arrival distribution is more dispersed than the equilibrium and that the average waiting time varies with the service time distribution as in the theoretical results, but the difference in population of customers has less effect on the average waiting time. Finally, we conducted simulations using various learning processes taking into account bounded rationality to examine the theoretical results and compare them with the experimental results.

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Grant amount：\17030000 （ Direct Cost: \13100000 、 Indirect Cost：\3930000 ）

The "patent thicket" that makes it difficult to produce products due to the fact that a large number of production technologies needed for production is patented separately by many companies has been a serious problem in production economies. As a solution to this problem, formation of a patent pool that licenses these patents collectively has been proposed. However, pools containing all necessary patents are often not actually formed. In this research, we first theoretically clarify that such a pool cannot be formed in the analysis based on the noncooperative equilibrium. Then we propose a new pool formation mechanism that incorporates firm behavior based on the farsighted stable set. We theoretically clarified that a pool containing all necessary patents would be formed if patent holding companies follow the mechanism. Furthermore, the effectiveness of this theoretical result was confirmed by conducting experiments using subjects.

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Grant amount：\5200000 （ Direct Cost: \4000000 、 Indirect Cost：\1200000 ）

We newly define a bicameral voting game by taking into account the probability that bills to be reconsidered according to Article 59 of the Constitution of Japan. Then we apply the game to the National Diet of Japan and study the stability of the ruling coalition in Japan.
To consider the weightiness of a single vote, we apply indices defined by European researchers, such as a representativeness and a governability, to Japanese national elections. We then observed that big cities with low weightiness of a single vote also have low representativeness and low governability.
Finally, we define a voting game where a medium scale voter is added to the ordinary apex game. It turns out that existence of the medium scale voter improves the welfare of minorities.

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Authorship：Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type：Competitive

Grant amount：\5070000 （ Direct Cost: \3900000 、 Indirect Cost：\1170000 ）

We studied mechanisms that promote the sale of EV by using both theoretical and experimental approaches.
In the theoretical analysis, we studied several models: First, we have derived an optimal selling method in a static model with incomplete information. Then we focused on the irreversibility of purchase decisions. We studied dynamic models with irreversible setting and with imperfect irreversible setting.
Moreover, we conducted a series of economic experiments to test the obtained selling method in our theoretical study. We conducted two types of experiments. In the first one, we used small group for detailed analysis. In the second one, we used larger group to examine the robustness of our mechanism. In both experiments, we found that our mechanism significantly improved the sale of EV.

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Grant amount：\36790000 （ Direct Cost: \28300000 、 Indirect Cost：\8490000 ）

As a platform of a virtual society experiment, we built a system of social networking, and added the functions of wiki, online questionnaire, vitalization experiments and matching experiments. We obtained some theoretical results, such as, the condition under which vitalization of the SNS occurs. On the other hand, from our experimental results, we confirmed that the specific point system which we constructed is effective for vitalization of SNS, and that long-term relationship can induce cooperative action between people with short-term relationship. Moreover, by survey we investigated the connection between activity in SNS and ordinal human relationship.

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