Final answer:
The HBR article in question discusses the quantifiable impact of social media 'likes' on business value, highlighting the challenge of quantifying intangible values such as love or friendship.
Step-by-step explanation:
The question 'what's the value of a like?' from the Harvard Business Review 2017, by authors Leslie K. John, Daniel Mochon, Oliver Emrich, and Janet Schwartz, deals with evaluating the impact of social media interactions, like 'likes', on brand value and consumer behavior in the field of Business. It touches on the notion that certain values in life such as love and friendship are immeasurable and cannot be quantified in monetary terms, which is a concept that is equally applicable in various aspects of business and marketing strategies.
For further understanding of the interaction between values and public opinion, the suggested further study is the book 'Hard Choices, Easy Answers: Values, Information and American Public Opinion' by Michael Alvarez and John Brehm, which delves into the American public's decision-making process and the role of values in it.