Climate-crop regression yield model: An appraisal

In 1889, while working in the field of genetics, Galton proposed what he called the “law of universal regression” which simply states that “each peculiarity in a man is shared by his kinsman, but to a less degree” ( Galton, 1889 ). This law was tested by Karl Pearson (1903) when he related over one thousand father’s height data with son’s height. He found indeed that there is a regression, or going back, ( Figure 1 ). More importantly, he found that the average height for a group of sons was less than the average height for a group of tall fathers. Figure 1 Karl Pearson&s;s classical study regressing son&s;s height with father&s;s height (after Pearson, 1903). A scatter plot showing the relationship between father and son height. The plot contains dozens of data points. The x-axis represents the father&s;s height in inches, ranging from 60 to 74 inches. The y-axis represents son&s;s height in inches, ranging from 64 to 74 inches. The values are actual. The data points show a positive correlation, indicating that taller fathers tend to have taller sons. A regression line is present, showing the trend of the data. All values are approximated. https://www.w3.org/1999/xlink" xlink:href=" https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003762713/8e2aff58-df00-4f18-82cb-3231363197ff/content/pg132_1.tif "/>