# Police officer fatalities: facts and figures

Andrey Kamenov, Ph.D. Probability and Statistics

In five years, 565 law enforcements workers died in work-related incidents. Most of them were police officers. The National Law Enforcement Officers Memorial Fund’s website is an excellent source for detailed reports.

The general statistics are also provided by the Census of Fatal Occupational Injuries.

According to the data available, there are two main fatality causes.  The most common cause is shooting (by other people, excluding suicides), with 196 cases. Roadway incidents are also very common, with 183 cases.

The good news is that there are small, but statistically significant, negative trends for both types of incidents. Actually, both numbers reached their historic lows recently. In 2013, only 33 fatal roadway incidents occurred, and 26 officers were shot.

# The vegan lifestyle: Is it healthy or not?

Pavel Prikhodko, Ph.D. Machine Learning

A healthy lifestyle has become a kind of fashion in the modern world; the vegan lifestyle is one of the trends. According to the results of a survey that asked consumers globally if they follow vegan diets in 2016, about 2 percent of the respondents from North America stated that they are vegans. The same percent was recorded in Europe. The share of people from Latin America who indicated that they follow a vegan diet was 4 percent.

In that year, some 6 percent of respondents from Africa and the Middle East followed a vegan diet. The largest percentage of people who are vegans was recorded in the Asia-Pacific region — 9 percent of the respondents stated themselves as vegans.

# Measuring seasonality in new housing starts

Andrey Kamenov, Ph.D. Probability and Statistics

The second half of the year traditionally sees more new housing starts. In fact, in this post, we’ll see that seasonality here is somewhat more complex. Is your job is related to the construction industry? Then you most likely have to take this into account.

# U.S. economic growth: gross domestic product

Alexander Fishkov, Ph.D. student Computer Science

Gross domestic product is commonly used to measure the economic performance of a country. GDP equals the value of all the goods and services produced in the economy minus the value of any goods or services used during the production process. Another name for this quantity is “value added.” Recently, the Bureau of Economic Analysis released data on GDP by industry for 2016. Today we will look at this data to see different industries’ contributions to the U.S. economy’s growth in the last year.

# How good is the Prosper borrower rating?

Andrey Kamenov, Ph.D. Probability and Statistics

For a regular investor, the single most important field in the Prosper dataset is the Prosper borrower rating. This is an estimate of a borrower’s creditworthiness based on various other metrics, including employment length, number of open accounts, prior delinquencies and many others. Based on the aggregate score, the borrowers are then split into seven groups: AA, A, B and so on. Alternatively, an investor may use numerical ratings ranging from 1 to 7, with 7 corresponding to the safest, most trustworthy borrowers.

# The nation on the move slows down

Kristine Barseghyan, Ph.D. (ABD) Social Sciences

People in the United States are more geographically mobile than in any other western country — at least they used to be. The idea that one can choose to move to a place that promises better life has been an important part of American life. For more than 40 percent of Americans who change their address every five years,[i] mobility is a lifestyle.

# Workplace violence in the United States

Andrey Kamenov, Ph.D. Probability and Statistics

Workplace violence (intentional injury caused by a person) remains to be the second leading cause of work-related fatalities in the U.S. It accounts for around 10 percent of all work-related deaths each year (with another 4 to 5 percent being suicides).

The vast majority of these cases were shootings, which constituted 82 percent of all homicides (and 49 percent of all suicides).

Importantly, the number of homicides has fallen by a third since 2003. In 2017, 417 incidents were recorded. This is not much higher than the lowest number ever: 404 in 2013.

On the other hand, the number of suicides keeps growing (albeit rather slowly). Here, 2013 also stands out — but this time it’s because of the highest number (282 incidents).

# E-book market in the United States

Pavel Prikhodko, Ph.D. Machine Learning

The internet era elevated the process of reading books to a whole new level. Since text was adapted into an electronic document for the first time, many people have abandoned physical books. The forecast by PricewaterhouseCoopers suggests that the revenue of the e-book market in the United States will grow by \$8.68 million in 2018. By the end of this year, e-book sales will generate about \$7.5 million. The forecast projects \$8.23 million in revenue for e-books in 2017.

# Innovation in Silicon Valley

Andrey Kamenov, Ph.D. Probability and Statistics

One particular area always stands out when discussing innovation in the United States: a portion of Santa Clara County, CA better known as Silicon Valley. The valley serves as a home to several of the largest high-tech companies in the country.

It’s not about the high-tech giants, though. The number of companies that were issued at least one new patent has doubled since 2000. The number of individually-issued patents also keeps growing slowly but steadily, as evidenced by the chart below.