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R & STATA code for (1) PPML gravity model (IV generation), (2) panel fixed effect regression (1st stage regression), and (3) local projection method

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๐Ÿฅ‡ 22nd KED Economics Essay Competition

[์ˆ˜์ƒ ๋‚ด์—ญ] ์ œ22ํšŒ ํ•œ๊ตญ๊ฒฝ์ œ์‹ ๋ฌธ ๊ฒฝ์ œ๋…ผ๋ฌธ ๊ณต๋ชจ์ „ ๋Œ€์ƒ (1์œ„)
[์—ฐ๊ตฌ] ๋ฌด์—ญ ๊ฐœ๋ฐฉ๋„์™€ ์†Œ๋“ ๋ถˆํ‰๋“ฑ์˜ ์ƒ๊ด€๊ด€๊ณ„ ๋ถ„์„ - ๋„๊ตฌ๋ณ€์ˆ˜์™€ ๋งˆํฌ์—… ๋™ํ•™์„ ํ™œ์šฉํ•˜์—ฌ -
[์—ฐ๊ตฌ ์ง„ํ–‰์ž] ๊ธ€๋กœ๋ฒŒ๊ฒฝ์ œํ•™๊ณผ 22 ๊ตฌ์žฌ์˜, 20 ์กฐ์ง€ํ›ˆ

[์‚ฌ์šฉ ๋ฐ์ดํ„ฐ]

  • 1980-2016 40๊ฐœ๊ตญ ๋Œ€์ƒ ํŒจ๋„ ๋ฐ์ดํ„ฐ

[์‚ฌ์šฉ ๋ชจํ˜•]

  • ์ฃผ์š” ๋ชจํ˜•: ํฌ์•„์†ก์œ ์‚ฌ์ตœ๋Œ€์šฐ๋„(PPML, Poisson pseudo maximum likelihood) ์ค‘๋ ฅ๋ชจํ˜•, ๊ตญ์†Œํˆฌ์˜๋ฒ• (LP, Local Projection)
  • ๊ธฐํƒ€ ๋ชจํ˜•/๊ธฐ๋ฒ•: 2SLS ํšŒ๊ท€๋ถ„์„ (2-stage least squares regression), ํŒจ๋„๊ณ ์ •ํšจ๊ณผ๋ชจํ˜• (Panel fixed effect regression)

[์—ฐ๊ตฌ ์ดˆ๋ก]
2020๋…„๋Œ€์— ๋“ค์–ด ์ฝ”๋กœ๋‚˜19 ํŒฌ๋ฐ๋ฏน๊ณผ ๋Ÿฌ์‹œ์•„-์šฐํฌ๋ผ์ด๋‚˜, ์ด์Šค๋ผ์—˜-ํ•˜๋งˆ์Šค ์ „์Ÿ ๋“ฑ์„ ๊ฒช์€ ์„ธ๊ณ„๋Š” ๋ณดํ˜ธ๋ฌด์—ญ์ฃผ์˜ ๊ธฐ์กฐ๋กœ์˜ ์ „ํ™˜์„ ๊ฐ€์†ํ™”ํ•˜๊ณ  ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ ๋ณ€ํ™”ํ•˜๋Š” ๋ฌด์—ญ ํ™˜๊ฒฝ ์†์—์„œ ์†Œ๋“ ๋ถˆํ‰๋“ฑ ๋ฌธ์ œ๋Š” ์—ฌ์ „ํžˆ ๋ฏธ๊ฒฐ์˜ ๊ณผ์ œ๋กœ ๋‚จ์•„ ์žˆ๋‹ค. ํŠนํžˆ ํ•œ๊ตญ์˜ ๊ฒฝ์šฐ, ๊ทผ๋กœ์†Œ๋“ ์ธก๋ฉด์—์„œ ๋ถˆํ‰๋“ฑ์ด ๊ฐœ์„ ๋˜์—ˆ๋‹ค๋Š” ๋ถ„์„์ด ์žˆ๋Š” ๋ฐ˜๋ฉด, ๋น„๊ทผ๋กœ์†Œ๋“์„ ํฌํ•จํ•œ ์ „์ฒด ์†Œ๋“ ๊ธฐ์ค€์œผ๋กœ๋Š” ๋ถˆํ‰๋“ฑ์ด ์‹ฌํ™”๋˜๊ณ  ์žˆ๋‹ค๋Š” ์ƒ๋ฐ˜๋œ ๊ฒฐ๊ณผ ๋˜ํ•œ ์กด์žฌํ•œ๋‹ค. ์ด๋ฅผ ๋ฐฐ๊ฒฝ์œผ๋กœ ๋ณธ ์—ฐ๊ตฌ๋Š” ๋ฌด์—ญ ๊ฐœ๋ฐฉ๋„์˜ ๋ณ€ํ™”๊ฐ€ ๊ธฐ์—…์˜ ๋งˆํฌ์—…(markup)๊ณผ ์†Œ๋“ ๋ถˆํ‰๋“ฑ์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„, ์„ ์ง„๊ตญ๊ณผ ๋น„์„ ์ง„๊ตญ ๊ฐ„์˜ ์ฐจ์ด๋ฅผ ์ค‘์‹ฌ์œผ๋กœ ๋ถ„์„ํ•˜๊ณ ์ž ํ•œ๋‹ค.
๋ฌด์—ญ ๊ฐœ๋ฐฉ๊ณผ ์†Œ๋“ ๋ถˆํ‰๋“ฑ ๊ฐ„์˜ ๊ด€๊ณ„๋Š” ํ—ฅ์…”-์˜ฌ๋ฆฐ ๋ชจํ˜•๊ณผ ์Šคํ†จํผ-์ƒˆ๋ฎค์–ผ์Šจ ์ •๋ฆฌ๋ฅผ ํ†ตํ•ด ๊ทธ ์ด๋ก ์  ๊ทผ๊ฑฐ๋ฅผ ์ฐพ์•„๋ณผ ์ˆ˜ ์žˆ๋‹ค. ๋‘ ์ด๋ก ์— ๋”ฐ๋ฅด๋ฉด, ๋ฌด์—ญ ๊ฐœ๋ฐฉ์€ ๋น„์„ ์ง„๊ตญ์—์„œ๋Š” ์†Œ๋“ ๋ถˆํ‰๋“ฑ์„ ์™„ํ™”ํ•˜๊ณ , ์„ ์ง„๊ตญ์—์„œ๋Š” ์ด๋ฅผ ์‹ฌํ™”ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋ณด์ธ๋‹ค. ํ•˜์ง€๋งŒ ์ตœ๊ทผ์˜ ์—ฐ๊ตฌ๋“ค์€ ๋ฌด์—ญ ๊ฐœ๋ฐฉ์ด ๋‹จ์ˆœํžˆ ์ž„๊ธˆ ๊ฒฉ์ฐจ์—๋งŒ ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ๊ฒƒ์ด ์•„๋‹ˆ๋ผ, ๊ธฐ์—…์˜ ์ด์œค ์ง€ํ‘œ์ธ ๋งˆํฌ์—…๊ณผ๋„ ๊นŠ์€ ๊ด€๊ณ„๋ฅผ ๊ฐ–๊ณ  ์žˆ์Œ์„ ์‹œ์‚ฌํ•œ๋‹ค. ์ด ๋งˆํฌ์—…์ด ์ƒ์Šนํ•˜๋ฉด ์ƒ์œ„ ์†Œ๋“ ๊ณ„์ธต์œผ๋กœ์˜ ์†Œ๋“ ์ง‘์ค‘์ด ๊ฐ•ํ™”๋˜์–ด ์†Œ๋“ ๋ถˆํ‰๋“ฑ์ด ์•…ํ™”๋  ์ˆ˜ ์žˆ๋‹ค๋Š” ๊ฒƒ์ด๋‹ค. ๋”ฐ๋ผ์„œ ๋ณธ ์—ฐ๊ตฌ๋Š” ๋ฌด์—ญ ๊ฐœ๋ฐฉ์ด ๋งˆํฌ์—…์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ๊ณผ ๊ทธ๋กœ ์ธํ•ด ๋ฐœ์ƒํ•˜๋Š” ์†Œ๋“ ๋ถˆํ‰๋“ฑ์˜ ๋ณ€ํ™”๋ฅผ ์ข…ํ•ฉ์ ์œผ๋กœ ๊ณ ๋ คํ•˜์—ฌ ๋ถ„์„ํ•˜๊ณ ์ž ํ•˜์˜€๋‹ค.
๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ๊ตญ์†Œ ํˆฌ์˜๋ฒ•(Local Projection)์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌด์—ญ ๊ฐœ๋ฐฉ๋„๊ฐ€ ์ด ๋งˆํฌ์—…๊ณผ ์†Œ๋“ ๋ถˆํ‰๋“ฑ์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ๋ถ„์„ํ•˜์˜€๋‹ค. ์ด๋•Œ ๋ฌด์—ญ ๊ฐœ๋ฐฉ ๋ณ€์ˆ˜์˜ ์ž ์žฌ์  ๋‚ด์ƒ์„ฑ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•ด ํฌ์•„์†ก ์œ ์‚ฌ์ตœ๋Œ€์šฐ๋„(PPML) ์ค‘๋ ฅ๋ชจํ˜•์„ ์‚ฌ์šฉํ•˜์—ฌ ๋„๊ตฌ๋ณ€์ˆ˜๋ฅผ ์ƒ์„ฑํ•˜๊ณ , 2๋‹จ๊ณ„ ์ตœ์†Œ์ œ๊ณฑ๋ฒ•(2SLS)์„ ์ ์šฉํ•˜์˜€๋‹ค. ๋ถ„์„ ๊ฒฐ๊ณผ, ๋น„์„ ์ง„๊ตญ์—์„œ ๋ฌด์—ญ ๊ฐœ๋ฐฉ์€ ์ด ๋งˆํฌ์—…์„ ์œ ์˜๋ฏธํ•˜๊ฒŒ ์ค„์ด๊ณ  ์†Œ๋“ ๋ถˆํ‰๋“ฑ์„ ์™„ํ™”ํ•˜๋Š” ๊ฒƒ์œผ๋กœ ๋‚˜ํƒ€๋‚ฌ๋‹ค. ์ด๋Š” ๋น„์„ ์ง„๊ตญ์€ ๋…ธ๋™์ง‘์•ฝ์  ์‚ฐ์—…์—์„œ ๋น„๊ต์šฐ์œ„๋ฅผ ์ ํ•˜๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์—, ๋ฌด์—ญ ๊ฐœ๋ฐฉ์ด ์ €์ˆ™๋ จ ๋…ธ๋™์ž์˜ ์ž„๊ธˆ ์ƒ์Šน์„ ์œ ๋„ํ•˜์—ฌ ์†Œ๋“ ๊ฒฉ์ฐจ๊ฐ€ ๊ฐ์†Œํ•œ ๊นŒ๋‹ญ์œผ๋กœ ์ถ”์ •๋œ๋‹ค. ๋ฐ˜๋ฉด, ์„ ์ง„๊ตญ์€ ๊ธฐ์ˆ ์ง‘์•ฝ์  ์‚ฐ์—…์—์„œ ๋น„๊ต์šฐ์œ„๋ฅผ ๊ฐ€์ง์— ๋”ฐ๋ผ ๊ณ ์ˆ™๋ จ ๋…ธ๋™์ž์˜ ์†Œ๋“์ด ์ƒ๋Œ€์ ์œผ๋กœ ๋” ํฌ๊ฒŒ ์ฆ๊ฐ€ํ•˜์—ฌ, ๊ฒฐ๊ณผ์ ์œผ๋กœ ๋ฌด์—ญ ๊ฐœ๋ฐฉ์ด ์ƒ์œ„ ์†Œ๋“ ๊ณ„์ธต์˜ ์†Œ๋“ ๋น„์ค‘์„ ๋Š˜๋ ค ์†Œ๋“ ๋ถˆํ‰๋“ฑ์„ ์‹ฌํ™”ํ•˜๋Š” ๊ฒฝํ–ฅ์„ ๋ณด์ธ ๊ฒƒ์œผ๋กœ ๋ถ„์„๋œ๋‹ค.
๋ณธ ์—ฐ๊ตฌ๋Š” ๋˜ํ•œ ์ด ๋งˆํฌ์—…๊ณผ ์†Œ๋“ ๋ถˆํ‰๋“ฑ ๊ฐ„์˜ ๋†’์€ ์ƒ๊ด€์„ฑ์„ ์‹ค์ฆ์ ์œผ๋กœ ์ž…์ฆํ•˜๋ฉฐ, ํ—ฅ์…”-์˜ฌ๋ฆฐ ๋ชจํ˜•๊ณผ ์Šคํ†จํผ-์ƒˆ๋ฎค์–ผ์Šจ ์ •๋ฆฌ๊ฐ€ ํ˜„์‹ค์—์„œ ์œ ํšจํ•˜๋‹ค๋Š” ์ ์„ ์žฌํ™•์ธํ•˜์˜€๋‹ค. ๋‚ด์ƒ์„ฑ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•œ ๋ถ„์„์„ ํ†ตํ•ด, ๊ธฐ์กด์— ์‹คํšจ์„ฑ์— ์˜๋ฌธ์ด ์ œ๊ธฐ๋˜์—ˆ๋˜ ์ด๋ก ๋“ค์˜ ํƒ€๋‹น์„ฑ์„ ๋‹ค์‹œ ํ•œ ๋ฒˆ ๊ฐ•์กฐํ•œ ๊ฒƒ์ด๋‹ค. ์ด๋ฅผ ํ†ตํ•ด์„œ ๋ณธ ์—ฐ๊ตฌ๋Š” ์ข…ํ•ฉ์ ์œผ๋กœ ๋ฌด์—ญ ์ •์ฑ… ์ˆ˜๋ฆฝ ์‹œ ๊ตญ๊ฐ€๋ณ„ ๊ฒฝ์ œ ๊ตฌ์กฐ ๋ฐ ์†Œ๋“ ๋ถ„ํฌ์˜ ๊ณ ๋ ค๊ฐ€ ํ•„์š”ํ•จ์„ ๋…ผํ•˜๋ฉฐ, ํŠนํžˆ ๋น„์„ ์ง„๊ตญ์—์„œ๋Š” ๋ฌด์—ญ ๊ฐœ๋ฐฉ์ด ์†Œ๋“ ๋ถˆํ‰๋“ฑ์„ ์™„ํ™”ํ•˜๋Š” ์ค‘์š”ํ•œ ์—ญํ• ์„ ํ•  ์ˆ˜ ์žˆ์Œ์„ ์‹œ์‚ฌํ•œ๋‹ค.

https://webzine.skku.edu/skkuzine/section/people01.do?mode=list&articleNo=123083
https://www.hankyung.com/article/2024112788721
https://www.hkessay.co.kr/bbs/board.php?bo_table=paperprize2025&wr_id=41

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R & STATA code for (1) PPML gravity model (IV generation), (2) panel fixed effect regression (1st stage regression), and (3) local projection method

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