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The purpose of this paper is to investigate the impacts of left Brazilian political parties and partisan disruption on the homicide rate in Brazil.

The authors use panel data for the states between the years 1980 and 2011. The database used is an unbalanced panel covering a sample of 27 Brazilian states over 32 years, 1980-2011, totaling about 855 observations.

It is estimated that these two political factors are sources that have connection to the increased level of violence in Brazil. These analyses provide several important results. First, partisan disruption is associated with a higher homicide rate, compared to non-partisan disruption. The results from the panel also suggest that left-parties in government have a positive impact on homicide, compared to non-left-parties.

Information regarding premeditated homicides (CID-BR-9 database) is available for all Brazilian states, and may be tabulated from the same micro-data at any level of aggregation. Some of the well-known problems regarding the choice of this variable are as follows. First, deaths resulting from wounds are sometimes included in the statistics whether wounds were intentionally inflicted or not. In addition, some incidents end up not being registered because certain deaths are not reported. This tends to occur more frequently in rural areas. Fortunately, this second problem does not appear to be too significant, as under-registry of deaths due to external causes is much lower than the amount resulting from natural causes (see, e.g. Cano and Santos, 2000). In addition, this problem may be controlled if under-registry remains stable over time by applying fixed effects to the panel data.

The main Brazilian political parties diverge on the causes of crime and how criminals should be punished. For example, in Brazil, the minimum age for one individual to be punished with imprisonment is 18 years old. Practices crimes for young people between 12 and 18 implies only in socio-educational measures. Given the high level of violence in Brazil, there is a bill being debated in the parliament that proposes to reduce the age to 16 years. Based on the research, 90 percent of the population approves the reduction of age to 16 years. However, the majority of parliament is opposed to changing the law. In general, the more conservative parties are favorable to changing the law.

These divergent postures can be associated with the ideological essence or to belief system of each political party. Political parties have the potential capacity of changing crime trends through economic and social policies as well as by applying stronger sanctions against crime. Given the law enforcement system, the cycle of crime in Brazil may be related to the profile of the political party elected.

The authors assume the hypothesis that the current Brazilian multi-partisan system has an incentive system in which politicians do not respond adequately to the basic wishes of voters. Among such desires, the authors emphasize public safety. This paper evaluates the empirical effect of partisan disruption on homicide rate.

An important question about the determinants of suicide refers to the role of media. In this context, the purpose of this paper is to investigate if there are groups of people who are susceptible to suicide as a result of the effect of media.

Using data for the 27 Brazilian states, for the period 1980-2009, to investigate the impact of the media index, unemployment rate, divorce rate and other explanatory variables on the rate of suicide by gender and age. First of all, the authors estimated a model of fixed effects panel. The second estimation method makes use of dynamic panel data with instrumental variables. Each of the results generated by these two estimated models is compared with those obtained by ordinary least squares in stacked data. The authors develop a model about the suicide epidemic where the media works as a contagion effect to disseminate suicidal behavior.

The authors observe that, the media index is the third motivator of suicide, after unemployment and violence, for all groups of people. The estimated model shows that 1 percent increase in media index increases suicide rate of young men (aged between 15 and 29 years) at 4.22 percent.

The empirical results are limited because the authors developed a media index based on quantities of televisions and radios. The authors suggest other research include social media in the index as well.

This result seems to suggest a type of contagion effect on suicide rates, which reinforces the results obtained by Cutler et al. (2001).