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Measuring The Relative Importance Of Different Agricultural Inputs To Global And Regional Crop Yield Growth Since 1975, Erik Nelson, Clare Bates Congdon
Measuring The Relative Importance Of Different Agricultural Inputs To Global And Regional Crop Yield Growth Since 1975, Erik Nelson, Clare Bates Congdon
Economics Department Working Paper Series
We identify the agricultural inputs that drove the growth in global and regional crop yields from 1975 to the mid-2000s. We find that improvements in agricultural technology, increased fertilizer use, and changes in crop mix around the world explained most of the gain in global crop yields, although impacts varied across the latitude gradient. Climate change over this time period caused yields to be only slightly lower than they would have been otherwise. In some cases cropland extensification had as much of a negative impact on global and regional yields as climate change. To maintain the momentum in yield growth …
Modeling And Testing Consumer Engagement In The U.S. Organic Food Market, John L. Anderson
Modeling And Testing Consumer Engagement In The U.S. Organic Food Market, John L. Anderson
Honors Projects
This study specifies the types of consumers that participate in the U.S. organic market and investigates their revealed preferences. I propose three theoretical consumer types – indifferent consumers, informed organic food lovers, and uninformed organic food lovers – and conduct cross-sectional and time-trend analyses utilizing organic fruit purchase data compiled by The Neilsen Company. The cross-sectional analysis is estimated with a two-stage Heckman selection model, while the time-trend analysis uses simple descriptive statistics and a differenced OLS regression technique. Households are most likely to participate in the organic fruit market if they have a well-educated white or Asian head, are …