Comparison

People have a desire to compare themselves with others. In many cultures children learn they should win to demonstrate that they are better, stronger and more successful than the others.

Direct comparison might lead to different results from Muhammad Ali’s famous ”I am the greatest” via ”The grass is always greener on the other side of the fence.” Actually, Ali stated even more: ”I’m not the greatest. I’m the double greatest. Not only do I knock ’em out, I pick the round. I’m the boldest, the prettiest, the most superior, most scientific, most skillfullest fighter in the ring today.” In principle we may believe that self-qualification is suspicious, and leads to woolf-boolf type biased ranking. Ali’s statement on himself, however, is approved by the ”collective wisdom”: almost everyone from the generation who saw him in the ring believes that Ali was really the greatest. When the U.S. Army measured Ali’s IQ at 78, he said, ”I only said I was the greatest, not the smartest.” I find amazing how objectively describes himself: ”It’s just a job. Grass grows, birds fly, waves pound the sand. I beat people up.”

As opposed to the result of Ali’s positive self-ranking, another class of comparison expresses inferiority complex. The idea behind the quotation ”The grass is always greener on the other side of the fence” may have its origin in the poem of Ovid (43 BCE – 17 or 18 CE) Art of Love. He wrote, ”The harvest is always richer in another man’s field.” There are other proverbs expressing similar attitude: ”The apples on the other side of the wall are the sweetest,” ”Our neighbour’s hen seems a goose,” and ”Your pot broken seems better than my whole one.” These all convey the message of others have a better life, are more fortunate than we are. The German version of the proverb states that ”Kirschen in Nachbars Garten schmecken immer besser” (The cherries in the neighbour’s garden always taste better.) A life might be miserable if you always feel that others have better stuffs. The feeling makes you envy and might lead to anxiety and to other mental health problems. The suggestion of Robert Fulghum, author of former best seller book All I Really Need to Know I Learned in Kindergarten is not only more objective, but also offers a viable strategy: ”The grass is not, in fact, always greener on the other side of the fence. No, not at all. Fences have nothing to do with it. The grass is greenest where it is watered. When crossing over fences, carry water with you and tend the grass wherever you are.”

The idiom ”comparing apples and orange” refers to situations, when two items practically cannot be compared. Apples and oranges are thought incomparable or incommensurable. In many European language ”comparing apples and pears” are used. Since comparison is the basis of any ranking procedure, and it has a unique role in or decision makings, I will argue that we need to find the balance between accepting reality and make an effort to change things towards future successes.

 

 

Is a horse bigger or smaller than a cow?

Ferenc Jánossy (1914-1997), an engineer-turned economist from a legendary Hungarian family (he was the step son of George Lukács (1885-1971), one of the founders of the philosophy of ”Western Marxism”), wrote a book in Hungarian with the title ”The measurability and a new measuring method of economic development level”, and it was a revelation at that time. Jánossy explained his approach clearly:

”The first issue is how qualitatively different objects can be compared quantitatively. Every child knows that an elephant is bigger than a sparrow. They would agree without the least doubt that the cow is smaller than the elephant, but bigger than the sparrow. Ranking animals according to size, they would place the cat between the cow and the sparrow without any hesitation. But suddenly the child is faced by the problem of the horse. Where should the horse go? Is it bigger or smaller than the cow? When comparing objects of different characteristics, ranking is no longer so simple because taking into consideration various features may lead to various ranking results. (The horse is taller, yet shorter than the cow.)..”

Generalizing the above game Jánossy finds that the greater the qualitative difference between two items the greater is the quantitative difference needed to make the ranking reliable according to size. Qualitative difference is limiting the quantitative comparability – this is what Jánossy calls the ’criterion of comparability’. Obviously, the critical limit depends on the features compared. (If ranking is only according to height, then the horse-cow dilemma does not even arise.) Ranking, however, is not the aim but only the means, therefore the basis of the comparison cannot be changed to make ranking easier. A clear definition of the organizing principle may lower the critical limit but cannot eliminate it.

The next question is how to move from ranking to measuring. How to make a quantitative statement, or rather under what conditions could be quantitatively described that Sweden is more advanced than Turkey. If any one feature is not additive or cannot be traced back to some additive feature, it cannot be measured. If a feature is measurable, then the comparison of two objects can be decomposed into two steps of “numerical measurements along a fixed scale”. Which means that the critical limit of measurability matches the given absolute scale and the limit of comparability of the object. If the examined feature of the objects can be measured along an absolute scale, the critical limit can be expressed numerically.

This is an example to gave the hint that ranking and rating needs appropriate methods, and the methods have limits! It is very vital to accept the existence of the limits of comparability!

A not-so beautiful tale: An example for intentional biased ranking from a Hungarian folktale

László Arany (1844-1898), the son of the celebrated poet, and the “Shakespeare of ballads”, János Arany (1817-1882), collected Hungarian folktales. One of these tales taught children, how decisions supposed to bring collectively can be manipulated by the strongest participant.

A number of animals escaped from their homes, and fell into a trap. They were not able to escape, and became very hungry. There wasn’t any food around, so the wolf suggested a solution: ”Well, my dear friends! What to do now? We should eat soon, otherwise we starve to death. I have an idea! Let us read the names of all of us, and the most ugly one will be eaten.” Everybody agreed, (I have never understood, why). The wolf  assigned himself to be the judge, and counted:
”Woolf-boolf o! So great!, fox-box also great, my dear-my beer very great, rabbit-babbit also great, cock-bock also great, my hen-my-ben, you are not great.. and they ate the hen… so on…next time cock-bock became food… (thanks to Judit Zerkowitz for the translation from Hungarian).

This is a great example of demonstrating how objectivity is manipulated if one of the voters controls an election.

Global Passport Power Rank 2017

Fareed Zakaria just mentioned in his GPS at CNN  a list of countries ranked by their passport index.  Countries  ranked by their total visa-free score:

Singapore becomes most powerful passport in the world.

“Paraguay helps Singapore overtake Germany for the top spot. Montreal, October 24, 2017 – Paraguay removed visa requirements for Singaporeans, propelling Singapore’s passport to the top of Passport Index’ most powerful ranking with a visa-free score of 159. Historically, the Top 10 most powerful passports in the world were mostly European, with Germany having the lead for the past two years. Since early 2017, the number one position was shared with Singapore, which was steadily going up. Other Asian passports in the Top 20 include those of South Korea, Japan and Malaysia. According to The Hon. Philippe May, Managing Director of Arton Capital’s Singapore office, “For the first time ever an Asian country has the most powerful passport in the world.” “It is a testament of Singapore’s inclusive diplomatic relations and effective foreign policy,” shared May. …”

 

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Rating and ranking of soccer players: the illusion of objectivity

I must have been maybe ten, eleven years old, still remember well to a paradoxical title of a journal article : ‘Let the objective numbers speak!” I enlighten you, why was it paradoxical. At the ends of the soccer seasons the sport newspaper evaluated the performance of the players for each of the eleven positions, from goalkeepers to left wingers. The article, in addition to the verbal appraisal, contained eleven ranked lists, one for each position; players from each team were ranked based on their seasonal scores, Fig.  shows. How these scores were constructed? Please note: soccer is not baseball, there is no objective measure to score the players. A journalist apprentice was delegated to every game, and he (surely he) gave a score to each player after each game. Any player, who was sending off from the field, got a score ”one”. A very few players in each season received a score ”ten” for their extraordinary performances. The majority of the scores was in the ”five” to ”eight” interval. More or less the meaning of ”five” was ”somewhat below average”, and ”eight” indicated ”excellent” (but not brilliant). After each game as we walked with my Dad, to the tram stop to get a ride from the suburb called Újpest, where our stadium has been located, to our apartment in ”Újlipótváros”, we also gave our own scores to each players of our team. I was impatiently waiting the morning paper to compare their scores with mines. At the end of the season, when I read about ”objective numbers”, I knew well that they reflected ranks on the objective average of their subjective grades. This observation suggested, that ranking based on subjective rating generates the illusion of objectivity only. The scores were not random, they reflected the best estimations of the journalists, but beyond dispute they were subjective.

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The Ranking Game

The only guy who seems to have escaped the rankings game is Adam. He got into the record books without trying: Before him there was nobody. Eve had to settle for runner-up, and look what happened when she tried to get ahead by snacking on a piece of fruit…”

I am reading about what people wrote about the ranking game.  Stephen Joel Trachtenberg is president emeritus  of George Washington University published in 2011 a witty article .

“The ancient Greeks picked up the game, fashioning bits of gold, silver and bronze to represent win, place and show. Earning an Olympic medal meant, and still means, you are the best of the best, the top dog in your chosen category of competition. It is absolute and objective, not relative and subjective. The best sprinter gets the gold because she is fast, not because she is popular…”

Thank you, Prof. Trachtenberg!

Rules of a scientist life

Adopted from the site

  1. See failure as a beginning, not an end

  2. Never stop learning

  3. Assume nothing, question everything

  4. Teach others what you know

  5. Analyze objectively

  6. Practice humility

  7. Respect constructive criticism

  8. Give credit where it is due –

  9. Take initiative

  10. Ask the tough questions early

  11. Love what you do, or leave