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Osaka School of International Public Policy

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KAMADA Takuma

Field of Research

Criminology, Urban Sociology, Social Inequality

Research Topics

(i) Understanding the effects of social policies and law enforcement on crime

(ii) Understanding the effects of crime-related events in shaping social inequality

Overview of Research 

My research focuses on communities and crime. In particular, I study (i) the conditions under which institutional contexts – both social policies and law enforcement – affect crime, and (ii) how crime-related events shape the persistence of community relations and social inequality. I exploit quasi-experimental research designs to examine these interrelated research questions. In the following paragraphs, I briefly summarize some of my research projects that speak to RQs (1) and (2).

RQ (1)

Medical Marijuana Laws reduce violence associated with Mexican drug trafficking organizations (joint with Evelina Gavrilova and Floris Zoutman)

Billions of dollars are spent to combat Mexican drug trafficking organizations, who play a crucial role in smuggling drugs to the U.S. and resort to violence for their revenues. This project considers an alternative way to combat Mexican drug trafficking organizations by examining the effect of medical marijuana laws on violence in the U.S.-Mexico border states. The graph below shows that the effect of medical marijuana laws on violence diminishes as counties in the U.S. are farther located from the U.S.-Mexico border.

Yakuza Exclusion Ordinances reduces the number of yakuza members but increases fraud (joint with Tetsuya Hoshino)

Unlike other countries, it is not illegal to form a criminal organized syndicate, the yakuza, or join one in Japan. Yet, Japan has recently tightened enforcement on them by enacting yakuza exclusion ordinances. This project studies the intended and unintended consequences of the ordinances. The graph below shows that the revenues of fraud increases as a response to the enactment of the yakuza exclusion ordinances.

RQ (2)

The crack epidemic in the mid-1980s has changed the residential landscape over two decades (dissertation)

Many U.S. inner-cities experienced the crack epidemic in the mid-1980s—an unusually violent and racialized drug epidemic. This project considers the long-run effects of the crack epidemic in the mid-1980s on the residential landscape over two decades by examining suburbanization, residential racial segregation, and neighbourhood concentrated poverty. The graph below shows that crack’s emergence increased black concentrated poverty in the inner-city over two decades.

 

Message to Students

Crime, urban problems, and social inequality are necessarily interdisciplinary. OSIPP comprises of researchers with various backgrounds. In this unique environment, I hope you are attentive to different perspectives and flexible with research ideas. My door is always open.

KAMADA, Takuma 
Associate Professor
Degree: Ph.D. in Sociology (The Pennsylvania State University)
kamada@osipp.osaka-u.ac.jp

OU Researcher Database

OSIPP Faculty

AKAI, Nobuo

Professor
Public Economics
Hasao-sensei-OSIPP-Osaka-University

HASUO, Ikuyo 

Professor
Global Governance, International Public Administration

HAWKINS, Virgil

Professor
International Politics, Media Studies

HOSHINO, Toshiya

Professor
International Politics, United Nations Studies

IKEFUJI, Masako
Professor

Macroeconomics, Environmental Economics

ISHISE, Hirokazu

Associate Professor
Macroeconomics, International Economics

KATAGIRI, Azusa

Associate Professor
International Relations, Political Methodology

KAMADA, Takuma

Associate Professor
Criminology, Urban Sociology, Social Inequality
Kawamura-professor-OSIPP-Osaka-University

KAWAMURA, Michiya

Associate Professor
Multiculturalism, Liberalism, Migration

KIDO, Eiichi

Professor
Contemporary German Politics, Peace Studies

KOHARA, Miki

Professor
Labor Economics, Applied Econometrics

MAEKAWA, Wakako

Associate Professor
International Relations, Conflict Resolution, Peace Studies

MATSUBAYASHI, Tetsuya

Professor
Political Science, Political Economics, Social Epidemiology

MINAMI, Kazushi

Associate Professor
International Relations of East Asia, U.S. Foreign Relations, Cold War

MUROOKA, Takeshi

Associate Professor
Psychology and Economics, Industrial Organization, Microeconomic Theory

NAKAJIMA, Hiroo

Professor
History of American Foreign Relations, International History

NISUGI, Kento

Associate Professor
International Law

NIWA, Hidekazu

Assistant Professor
Macroeconomics

OKUBO, Kunihiko

Professor
Civil Law

OTSUKI, Tsunehiro

Professor
Development Economics

SAIRENJI, Takayuki

Associate Professor
EU Law

SUNAGA, Miho

Assistant Professor

Macro Economics

TABUCHI, Yumi

Assistant Professor
History of U.S. Foreign Relations

TAKATA, Hinako

Associate Professor
International Law

WANG,Dongqin

Assistant  Professor
Development Economics, Health Economics

TAKII, Katsuya

Professor
Economics of Human Resource Allocation, Economics of Human Capital and Organization, Search and Matching Theory

WANI, Kentaro

Professor
International Law

YAMASHITA, Mamiko

Assistant  Professor
Financial Econometrics, Finance

YAMASHITA, Takuro

Professor
Microeconomic theory

ABE, Shuya

Assistant Professor
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