Note:
(a) Greg Mankiw https://en.wikipedia.org/wiki/Greg_Mankiw
(1958- ; His grandparents were all Ukrainians; BA in economics Princeton 1980; PhD in economics from MIT in 1984; section 3 Textbooks)
(i) The Ukrainian surname Mankiw (in English alphabet) comes from Ukrainian Ма́нків (Romanization: Mánkiv). https://en.wiktionary.org/wiki/Mankiw
(ii) Let's pay attention to the last letter:
Ukrainian alphabet https://en.wikipedia.org/wiki/Ukrainian_alphabet
(section 3 Letter names and pronunciation: В (upper case) в (lower case) has "Most common transliteration" as "v" but IPA can be w or v)
(iii) Jay Nordlinger, Mankiw as in 'Thank You.' National Review, July 1, 2020 (On a Podcast with the Economist N Gregory Mankiw). https://www.nationalreview.com/corner/mankiw-as-in-thank-you/
tells you how to pronounce the surname.
(b) In print as online, the photo lists its source but has no caption.
(c)
(i) Robert Heilbroner https://en.wikipedia.org/wiki/Robert_Heilbroner
(1919-2005; "In 1963, Heilbroner earned a Ph.D. in Economics from the New School for Social Research" in Greenwich, Manhattan)
(ii) Kenneth Arrow https://en.wikipedia.org/wiki/Kenneth_Arrow
(1921 – 2017; "earned a Bachelor's degree from the City College of New York in 1940 in mathematics * * * In 1951, he earned his PhD from Columbia"/ a professor mainly at Stanford)
(iii) Arthur M Okun https://en.wikipedia.org/wiki/Arthur_Melvin_Okun
(1928-1980; "chairman of the Council of Economic Advisers between 1968 and 1969 [under president LBJ] * * * graduated from Columbia College [ie, undergraduate college] in 1949* * * He went on to obtain a Ph.D. in economics from Columbia in 1956")
(iv) Charles Wheelan https://en.wikipedia.org/wiki/Charles_Wheelan
(1966- ; "graduated from Dartmouth College in 1988")
The above Wiki page does not say it, but he does hold graduate degrees. See Charles J Wheelan. Senior Lecturer, Dartmouth College, undated https://faculty-directory.dartmouth.edu/charles-j-wheelan
("DEPARTMENT(S)[:] Rockefeller Center, Education
CENTER(S)[:] The Nelson A Rockefeller Center for Public Policy [at Dartmouth College, on social science research])
EDUCATION[:]
BA Dartmouth College
Master's Princeton University
PhD University of Chicago")
(v) Yoram Bauman https://en.wikipedia.org/wiki/Yoram_Bauman
(1973- ; "He received an undergraduate degree in mathematics at Reed College in Portland, Oregon. In 2003, Bauman attended graduate school at the University of Washington in Seattle, Washington, where he obtained a PhD in Economics. Bauman is an environmental economist. * * * Bauman is a strong supporter of a carbon tax")
(vi) Grady Klein is a cartoonist, an illustrator, and an animator." Macmillan Publishers, undated.
In other words, Klein is not an economist.
(d)
(i) James Chen, Pareto Improvement: Definition, Examples, Critique. Investopedia, updated Apr 20, 2021 https://www.investopedia.com/terms/p/paretoimprovement.asp
(paragraph 1: "Under the rubric of neoclassical economic theory, a Pareto improvement occurs when a change in allocation harms no one and helps at least one person, given an initial allocation of goods for a set of persons. The theory states that Pareto improvements can keep enhancing value to an economy until it achieves a Pareto optimum [also known as Pareto efficiency], where no more Pareto improvements can be made")
(ii) Pareto Efficiency Examples and Production Possibility Frontier. Investopedia, updated Apr 6, 2023 https://www.investopedia.com/terms/p/pareto-efficiency.asp
(paragraph 1: "Pareto efficiency, or Pareto optimality, is an economic state where resources cannot be reallocated to make one individual better off without making at least one individual worse off. Pareto efficiency implies that resources are allocated in the most economically efficient manner, but does not imply equality or fairness. An economy is said to be in a Pareto optimum state when no economic changes can make one individual better off without making at least one other individual worse off"_