54 citations · 81 across the 5 of their papers we have counts for
6 papers
Sentiment in New York City: A High Resolution Spatial and Temporal View
Karla Z. Bertrand, Maya Bialik, Kawandeep Virdee +2
Measuring public sentiment is a key task for researchers and policymakers alike. The explosion of available social media data allows for a more time-sensitive and geographically sp…
Food for fuel: The price of ethanol
Dominic K. Albino, Karla Z. Bertrand, Yaneer Bar-Yam
Conversion of corn to ethanol in the US since 2005 has been a major cause of global food price increases during that time and has been shown to be ineffective in achieving US energ…
A Complex Systems Science Approach to Healthcare Costs and Quality
Yaneer Bar-Yam with Shlomiya Bar-Yam, Karla Z. Bertrand, Nancy Cohen +3
There is a mounting crisis in delivering affordable healthcare in the US. For decades, key decision makers in the public and private sectors have considered cost-effectiveness in h…
UPDATE February 2012 - The Food Crises: Predictive validation of a quantitative model of food prices including speculators and ethanol conversion
Marco Lagi, Yavni Bar-Yam, Karla Z. Bertrand +1
Increases in global food prices have led to widespread hunger and social unrest---and an imperative to understand their causes. In a previous paper published in September 2011, we…
The Food Crises: A quantitative model of food prices including speculators and ethanol conversion
Marco Lagi, Yavni Bar-Yam, Karla Z. Bertrand +1
Recent increases in basic food prices are severely impacting vulnerable populations worldwide. Proposed causes such as shortages of grain due to adverse weather, increasing meat co…
The Food Crises and Political Instability in North Africa and the Middle East
Marco Lagi, Karla Z. Bertrand, Yaneer Bar-Yam
Social unrest may reflect a variety of factors such as poverty, unemployment, and social injustice. Despite the many possible contributing factors, the timing of violent protests i…