Data Visualization #9–Non-ideal use of Stacked Bar Plots

Stacked bar plots (charts) are a very useful data visualization type…when used correctly. In an otherwise excellent report on the “Escalating Terrorism Problem in the United States” from the Center for Strategic and International Studies, there is a problematic stacked bar chart (actually, a stacked percentage chart) that should have been replaced by a grouped bar chart (or something else). Here is the, in my opinion, problematic chart:

The reason I believe this chart is problematic is because the chart could potentially obscure the nature (and trend) of the underlying data. The chart above is consistent with any number of underlying data patterns. Just as an example, let’s look at 2019 and 2020. We have the following percentage breakdown over the two years:

Type of Violence20192020
Ethnonationalist3%0%
Left-wing4%0%
Other0%0%
Religious30%7%
Right-wing63%93%

While it is obvious that ethnonationalist, and left-wing, violence have decreased (they are 0% in 2020), it is not clear whether right-wing and religious violence have increased, or decreased absolutely. Does right-wing violence in 2020 comprise 93% of 14 acts of terrorist violence? Or is it 93% of 200 acts of terrorist violence? We don’t know. To be fair to the authors of the report, they do provide a breakdown in absolute numbers later in the report. Still, I believe that a more appropriate use of a stacked bar/percentage chart is when the absolute number of instances is (relatively) static over the time/area of comparison.

Here’s an example from college football. The Pacific-12 conference has two divisions–North, and South. Every year each of the 6 teams in each division plays against 4 of the teams in the other division, for a total of 24 inter-divisional games every year. In addition, there is a PAC12 Championship Game, which pits the winner of each of the two divisions against each other at the end of the year. Therefore, there are 25 total inter-divisional PAC12 football games every year. A stacked percentage chart can be used to gauge the relative winning percentages of the two divisions against each other since the establishment of the PAC12 conference in 2011 (when Utah and Colorado were added).

Created by Josip Dasović

Here, each of the years refers to a total of 25 inter-divisional games. We can easily see the nature of the quality of the respective divisions by comparing the percentage of games won by each (over the other) between the years 2011 and 2019. We see that the North (which, by the way produced 8 of the 9 PAC12 champions during this period) has generally been stronger. In 6 of the 9 years, the North won a greater percentage of the inter-divisional games than did the South. And even in those years where the South won a greater percentage of the inter-divisional games, it wasn’t a much greater percentage.

So, use stacked percentage charts only when it is appropriate.

New Pentagon Report sees Climate Change as US National Security Threat

So, if you’re not convinced by the ethical perspectives on climate change, then maybe you’ll be convinced to take it seriously if you are told that it could make state less secure going forward. In a new report from the US Department of Defence (i.e., “The Pentagon”), climate change is seen as a “threat multiplier.” In the language of Homer-Dixon, this means that climate change is viewed not as an exogenous cause of conflict, but as a factor that could negatively influence hypothesized exogenous causes of both civil and inter-state conflict. This is how Bloomberg News responded to the release of the report:

Global warming will worsen many of the challenges the U.S. military already is grappling with, the department said in areport yesterday.

“We refer to climate change as a ‘threat multiplier’ because it has the potential to exacerbate many of the challenges we are dealing with today -– from infectious disease to terrorism,” Secretary of Defense Chuck Hagel said in a blog post. “While scientists are converging toward consensus on future climate projections, uncertainty remains. But this cannot be an excuse for delaying action.”

Here is the report in its entirely. I am also providing a video excerpt of an MSNBC story on the release of the report, which has the added virtue of including an interview with the author of one of the readings that I think at least 2 of you read for Wednesday’s seminar! The author is Chris Parenti, who has written an interesting book called Climate of Chaos.

A Virtual Trip to Myanmar for my Research Methods Class

For IS240 next week, (Intro to Research Methods in International Studies) we will be discussing qualitative research methods. We’ll address components of qualitative research and review issues related to reliability and validity and use these as the basis for an in-class activity.

The activity will require students to have viewed the following short video clips, all of which introduce the viewer to contemporary Myanmar. Some of you may know already that Myanmar (Burma) has been transitioning from rule by military dictatorship to democracy. Here are three aspects of Myanmar society and politics. Please watch as we won’t have time in class to watch all three clips. The clips themselves are not long (just over 3,5,and 8 minutes long, respectively).

The first clip shows the impact of heroin on the Kachin people of northern Myanmar:

The next clip is a short interview with a Buddhist monk on social relations in contemporary Myanmar:

The final video clip is of the potential impact (good and bad) of increased international tourism to Myanmar’s most sacred sites, one of which is Bagan.

What causes civil conflict?

In a series of recent articles, civil conflict researchers Esteban, Mayoral, and Ray (see this paper for an example) have tried to answer that question. Is it economic inequality, or cultural differences? Or maybe there is a political cause at its root. I encourage you to read the paper and to have a look at the video below. Here are a couple of images from the linked paper, which you’ll see remind you of concepts that we’ve covered in IS210 this semester. The first image is only part of the “Model of Civil Conflict.” Take a look at the paper if you want to see the “punchline.”

Screen shot 2014-02-07 at 1.54.26 AM

Here is the relationship between fractionalization and polarization. What does each of these measures of diversity measure?

Screen shot 2014-02-07 at 1.56.50 AM

And here’s a nice youtube video wherein the authors explain their theory.

Does Segregation lead to interethnic violence or interethnic peace?

That’s an important question, because it not only gives us an indication of the potential to stem inter-ethnic violence in places like Iraq, Myanmar, and South Sudan, but it also provides clues as to where the next “hot spots” of inter-ethnic violence may be. For decades now, scholars have debated the answer to the question. There is empirical evidence to support bot the “yes” and “no” sides. For example, in a recent article in the American Journal of Political Science [which is pay-walled, so access it on campus or through your library’s proxy] Bhavnani et al. list some of this contradictory evidence:

How to create peace between Protestants and Catholics in Belfast? Erect 18-ft high "peace lines"
How to create peace between Protestants and Catholics in Belfast? Erect 18-ft high “peace lines”

Evidence supporting the claim that ethnic rivals should be kept apart:

  • Los Angeles riots of 1992, ethnic diversity was closely associated with rioting (DiPasquale and Glaeser 1998),
  • That same year, Indian cities in Maharashtra, Uttar Pradesh, and Bihar, each of whichhad a history of communal riots, experienced violence principally in locales where the Muslim minority was integrated. In Mumbai, where over a thousand Mus-
    lims were killed in predominantly Hindu localities, the Muslim-dominated neighborhoods of Mahim, Bandra,
    Mohammad Ali Road, and Bhindi Bazaar remained free of violence (Kawaja 2002).
  • Violence between Hindus and Muslims in Ahmedabad in 2002 was found to be significantly higher in ethnically mixed as opposed to segregated neighborhoods (Field et al. 2008).
  • In Baghdad during the mid-2000s, the majority displaced by sectarian fighting resided in neighborhoods where members of the Shi’a and Sunni communities lived in close proximity, such as those on the western side of the city (Bollens2008).

Evidence in support of the view that inter-mixing is good for peace:

  • Race riots in the British cities of Bradford, Oldham, and Burnley during the summer of 2001 were attributed to high levels of segregation (Peach 2007).
  • In Nairobi, residential segregation along racial (K’Akumu and Olima 2007) and class lines (Kingoriah 1980) recurrently produced violence.
  • In cities across Kenya’s Rift Valley, survey evidence points to a correlation between ethnically segregated residential patterns, low levels of trust, and the primacy of ethnic over national identities and violence (Kasara 2012).
  • In Cape Town, following the forced integration of blacks and coloreds by means of allocated public housing in low-income neighborhoods, a “tolerant multiculturalism” emerged (Muyeba and Seekings 2011).
  • Across neighborhoods in Oakland, diversity was negatively associated with violent injury (Berezin 2010).

Scholars have advanced many theories about the link between segregation and inter-ethnic violence (which I won’t discuss right now), but none of them appears to account for all of this empirical evidence. Of course, one might be inclined to argue that segregation is not the real cause of inter-ethnic violence, or that it is but one of many causes and that the role played by segregration in the complex causal structure of inter-ethnic violence has yet to be adequately specified.

Nomothetic Explanations and Fear of Unfamiliar Things

Bringing two concepts together, in Research Methods today we discussed the MTV show 16 and Pregnant as part of our effort to look at cause-and-effect relationships in the social sciences. The authors of a new study on the aforementioned television program demonstrate a strong link between viewership and pregnancy awareness (including declining pregnancy rates) amongst teenagers.

We used this information, along with a hypothesized link between playing video games and violent behaviour. I then asked students to think about another putatively causal relationship that was similar to these two, from which we could derive a more general, law-like hypothesis or theory.

The computer lab presented us with another opportunity to think about moving from more specific and contextual causal claims to more general ones. Upon completion of the lab, one of the students remarked that learning how to use the R statistical program wasn’t too painful and that he had feared having to learn it. “I guess I’m afraid of technology,” he remarked. Then he corrected himself to say that this wasn’t true, since he didn’t fear the iphone, or his Mac laptop, etc. So, we agreed that he only feared technology with which he was unfamiliar. I then prodded him and others to use this observation to make a broader claim about social life. And the claim was “we fear that with which we are unfamiliar.” That is generalizing beyond the data that we’ve just used to extrapolate to other areas of social life.

Our finishing hypothesis, then, was extended to include not only technology, but people, countries, foods, etc.

P.S. Apropos of the attached TED talk, do we fear cannibals because we are unfamiliar with them?

Ghosts of Rwanda

In POLI 1140, we have read an excerpt from Rwanda section of Samantha Power’s prize-winning book, A Problem from Hell: America and the Age of Genocide, in which Power assesses the reasons for the lack of response by the Clinton administration in the spring of 1994 to the developing genocide in Rwanda. Power makes many points but one of the most trenchant is that despite the apparently early decision by Clinton that he would not send US troops to Rwanda (fearful that another Somalia could ensue), many other actions–short of sending troops-could have been taken by the US government and military. Something as simple as sending planes with the capability to jam radio frequencies may have slowed down the killing and saved countless lives.

Here is a compelling and very informative documentary by PBS’ Frontline series on the events surrounding the Rwandan genocide, paying special attention to the lack of action on the part of the United Nations and the United States. Many of the ideas in Power’s book are addressed here.

Thomas Lubanga First Person Convicted by ICC

Wednesday, March 14th, 2012 will stand as a watershed moment in international relations and in international law, specifically. Thomas Lubanga, former militia leader in the eastern Democratic Republic of Congo (DRC) is the first person ever convicted by the recently formed International Criminal Court (ICC). Though there have been dozens of convictions of war crimes suspects from the wars in the former Yugoslavia and Rwanda, these cases were process by temporary courts–the ICTY and the ICTR, respectively–and not the ICC. Lubanga was accused of conscripting, enlisting, and using child soldiers in the conflict in the Ituri region of the DRC. Rather than playing a role in the post-war political process, (which he had hoped) Lubanga was arrested in March 2005 and extradited to the ICC one year later. It is only now, seven years after his arrest, that a verdict on this case has come down.

Lubanga’s conviction is the end of a multi=year trial process, the legitimacy of which was undermined at times by the lack of prosecutorial professionalism, and other issues. For more about the trial, go here, and watch the videos below.

Does Globalization Cause Ethnic Conflict?

Today’s session in IS 309 addressed the link between globalization and ethnic conflict. Our main reading material came from Amy Chu’s book, World On Fire, the thesis of which is that the twin phenomena of economic globalization and the spread of liberal democracy cause ethnic conflict in countries that have “market-dominant minorities.” Cynthia Olzak’s recently published article in the Journal of Conflict Resolution answers the same question in this way:

This article examines how different components of globalization affect the death toll from internal armed conflict. Conventional wisdom once held that the severity of internal conflict would gradually decline with the spread of globalization, but fatalities still remain high. Moreover, leading theories of civil war sharply disagree about how different aspects of globalization might affect the severity of ethnic and nonethnic armed conflicts. Using arguments from a variety of social science perspectives on globalization, civil war, and ethnic conflict to guide the analysis, this article finds that (1) economic globalization and cultural globalization significantly increase fatalities from ethnic conflicts, supporting arguments from ethnic competition and world polity perspectives, (2) sociotechnical aspects of globalization increase deaths from
ethnic conflict but decrease deaths from nonethnic conflict, and (3) regime corruption increases fatalities from nonethnic conflict, which supports explanations suggesting that the severity of civil war is greater in weak and corrupt states.

Chua’s book was received with some praise but also with a fair amount of criticism. Here are some links to videos that may be of interest to you:

Documentary on Partition of Palestine 1947–With Map

In 1947, the UN General Assembly voted 33-13 (with 10 abstentions and 1 absent) in favour of a resolution (181) that would partition Palestine between Jews and Arabs. Today in IS309 we watched Benny Brunner’s documentary, Al Nakba (“the catastrophe”, in Arabic), which sets out to tell the story of the partition, the ensuing civil war, and the Arab-Israel war of 1948. The documentary was based on the historian Benny Morris’ book, The birth of the Palestinian refugee problem, 1947-49. We discussed (at times heatedly) issues regarding the morality/efficacy of partition as a potential solution to some situations of inter-ethnic conflict. In addition, we read Chaim Kaufmann’s article “When all else fails: Population Transfers and Partitions in the Twentieth Century,” which argues that there are situations where partition is a legitimate policy approach to inter-ethnic violence.