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Ameba DSPのOpen-Auctionにおける入札戦略
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Yoshitomo Hayashi
September 25, 2019
Technology
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Ameba DSPのOpen-Auctionにおける入札戦略
Yoshitomo Hayashi
September 25, 2019
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Transcript
"NFCB%41ͷ 0QFO"VDUJPOʹ͓͚Δ ೖࡳઓུ ΦϨγΧφΠτWPM
ྛ ۍ๎ʢHayashi Yoshitomoʣ w ॴଐ גࣜձࣾαΠόʔΤʔδΣϯτ ϝσΟΞ౷ׅຊ෦ΞυςΫϊϩδʔάϧʔϓ w ৬छ αʔόʔαΠυΤϯδχΞ
w झຯ ίʔώʔΞχϝεϚϒϥ
ϓϩμΫτͷհ 0QFO"VDUJPOʹ͓͚Δೖࡳઓུ 4FDPOE1SJDF"VDUJPOͷೖࡳઓུ 'JSTU1SJDF"VDUJPOͷೖࡳઓུ ·ͱΊ
ϓϩμΫτհ
ϓϩμΫτհ "NFCB
"NFCB*OGFFE "NFCB ྑ࣭ͳࣗࣾϝσΟΞͷࠂ৴͕Մೳ "NFCBͷΦʔσΟΤϯεσʔλΛ׆༻ͨ͠ ৴͕Մೳ
"NFCB%41 "NFCB ֎෦ϝσΟΞ 0QFO35#Ͱ441ͱ ଓ͢Δ͜ͱͰ֎෦ͷ༷ʑ ͳϝσΟΞʹ৴Մೳʹ 441 ֎෦ϝσΟΞ ֎෦ϝσΟΞ
"NFCB%41ͷ ϓϩάϥϚςΟοΫऔҾ
ϓϩάϥϚςΟοΫऔҾͷछྨ 35# /PO35# छྨ 0QFO"VJDUJPO *OWJUBUJPO0OMZ "VDUJPO 6OSFTFSWFE'JYFE 3BUF "VUPNBUFE
(VBSBOUFFE ࡏݿ༧ ͳ͠ ͳ͠ ͳ͠ ͋Γ ΦʔΫγϣϯ ͋Γʢೖࡳʣ ͋Γʢೖࡳʣ ͳ͠ʢݻఆ୯Ձʣ ͳ͠ʢݻఆ୯Ձʣ ࠂʢࡏݿʣ ͷ࣭ ʙߴ தʙߴ ߴ ߴ ࡏݿྔ ଟ த গ গ Ձ֨ ʙߴ தʙߴ ߴ ߴ ࡏݿͷ༏ઌ
ϓϩάϥϚςΟοΫऔҾͷछྨ 35# /PO35# छྨ 0QFO"VJDUJPO *OWJUBUJPO0OMZ "VDUJPO 6OSFTFSWFE'JYFE 3BUF "VUPNBUFE
(VBSBOUFFE ࡏݿ༧ ͳ͠ ͳ͠ ͳ͠ ͋Γ ΦʔΫγϣϯ ͋Γʢೖࡳʣ ͋Γʢೖࡳʣ ͳ͠ʢݻఆ୯Ձʣ ͳ͠ʢݻఆ୯Ձʣ ࠂʢࡏݿʣ ͷ࣭ ʙߴ தʙߴ ߴ ߴ ࡏݿྔ ଟ த গ গ Ձ֨ ʙߴ தʙߴ ߴ ߴ ࡏݿͷ༏ઌ 1.1
"NFCB%41͕ରԠ͍ͯ͠Δͷ 35# /PO35# छྨ 0QFO"VJDUJPO *OWJUBUJPO0OMZ "VDUJPO 6OSFTFSWFE'JYFE 3BUF "VUPNBUFE
(VBSBOUFFE ࡏݿ༧ ͳ͠ ͳ͠ ͳ͠ ͋Γ ΦʔΫγϣϯ ͋Γʢೖࡳʣ ͋Γʢೖࡳʣ ͳ͠ʢݻఆ୯Ձʣ ͳ͠ʢݻఆ୯Ձʣ ࠂʢࡏݿʣ ͷ࣭ ʙߴ தʙߴ ߴ ߴ ࡏݿྔ ଟ த গ গ Ձ֨ ʙߴ தʙߴ ߴ ߴ ࡏݿͷ༏ઌ
0QFO"VDUJPOʹ͓͚Δ ೖࡳઓུ
ͦͷલʹ ࠓճͷൃදʮ$"#"4&$".1ʯͰ͚ࣾʹͨ͠༰Λೖࡳઓུ ʹಛԽͯ͠ϦϥΠτͨ͠༰Ͱ͢ɻ ༧ଌपΓͷ༰ԼهͷϒϩάΛޚཡ͍ͩ͘͞ɻ $ZCFS"HFOU%FWFMQFST#MPH ʮਐԽ͢Δࠂ৴ϩδοΫͱ%41ઓུc$"#"4&$".1ʯ
ΦʔΫγϣϯͷ͘͠Έ %41" %41# %41$ SSP ೖࡳֹԁ ೖࡳֹԁ ೖࡳֹԁ Ұ൪ߴ͍ೖࡳֹΛఏࣔͨ͠%41͕ΦʔΫγϣϯʹউར͠ࠂ৴ͷݖརΛಘΔ ࢧ͍
ΦʔΫγϣϯछྨຖͷ441ͷࢧֹ͍ 'JSTU1SJDF"VDUJPOʢ'1"ʣ ˠೖࡳֹʢԁʣ 4FDPOE1SJDF"VDUJPOʢ41"ʣ ˠҐͷೖࡳֹʢԁʣ ೖࡳઓུΦʔΫγϣϯͷछྨ͝ͱʹߟ͑Δɻ
ೖࡳֹͷܭࢉ ೖࡳ$1.$53 ༧ଌ º$1$ $1"º$73 ༧ଌ º NBSHJO DSP ೖࡳֹ
$1. ࢧ͍ ച্ Ϛʔδϯԁ 80ԁ 100ԁ 441 ࠂओ ˞ࠂओ࣮ࡍʹΫϦοΫ՝ۚ ˞ϚʔδϯྫͰ͢
ϚʔδϯͱΦʔΫγϣϯউ ϚʔδϯΛߴ͘ઃఆ͗͢͠Δͱೖࡳֹ͕Լ͕ΓΦʔΫγϣϯͷউ͕Լ͕Δɻ ϚʔδϯΛͲ͏ઃఆ͢Δ͔͕ೖࡳઓུΛߟ͑Δ্Ͱॏཁʂ ΦʔΫγϣϯͷউ Ϛʔδϯ ߴ ೖࡳֹ
ΦʔΫγϣϯछྨຖͷೖࡳઓུ
'JSTU1SJDF"VDUJPO
'JSTU1SJDF"VDUJPO %41" %41# %41$ 441 ೖࡳֹԁ ೖࡳֹԁ ೖࡳֹԁ Ұ൪ߴ͍ೖࡳֹΛఏࣔͨ͠%41͕ΦʔΫγϣϯʹউར͠ɺͦͷֹۚΛ441ʹࢧ͏ɻ ࢧֹԁ
'JSTU1SJDF"VDUJPOͷೖࡳઓུ '1"ͷ߹ɺ ೖࡳֹࢧֹͳͷͰϚʔδϯૈརͱͳΔɻ ࣾͷೖࡳֹϓϥεԁʹೖࡳֹΛઃఆͰ͖Δ ͱૈར͕࠷େʹͳΔͷͰɺࣾͷೖࡳֹΛਖ਼ ֬ʹ༧ଌ͍ͨ͠ɻ ˠXJOQSJDF༧ଌΛ༻͍ͨೖࡳઓུ $1.ʢԁʣ ೖࡳֹ ʢԁɿࢧֹʣ
Ϛʔδϯ ࣾͷೖࡳֹ ʢԁʣ ૈར ཧతͳೖࡳֹ ʢԁɿࢧֹʣ
4FDPOE1SJDF"VDUJPO
4FDPOE1SJDF"VDUJPO 0QFO"VDUJPOͰओʹ4FDPOE1SJDF"VDUJPO͕࠾༻͞Ε͍ͯΔɻ Ұ൪ߴ͍ೖࡳֹΛఏࣔͨ͠%41͕ΦʔΫγϣϯʹউར͢Δ͕ɺࢧ͏ֹۚ൪ʹߴ͍ೖ ࡳֹͱͳΔɻ %41" %41# %41$ 441 ೖࡳֹԁ ೖࡳֹԁ
ೖࡳֹԁ ࢧֹԁ
4FDPOE1SJDF"VDUJPOͷೖࡳઓུ 441ʹࢧ͏ֹ൪ͷೖࡳֹʹͳΔͷͰɺ ࢧֹࣗͷೖࡳֹΑΓৗʹ͘ͳΔɻ ϚʔδϯΛ࠷ݶʹઃఆ͢Δ͜ͱͰɺউͱૈ ར͕࠷େԽ͢Δ͕ɺ༨Ϛʔδϯ͕ൃੜͯ͠͠ ·͏ɻ $1.ʢԁʣ ೖࡳֹʢԁʣ Ϛʔδϯ ࣾͷೖࡳֹ
ʢԁɿࢧֹʣ ૈར
༧ଌޡࠩΛߟྀͯ͠ϚʔδϯΛઃఆ͢Δ F$1.ʢԁʣ Ϛʔδϯ ࣾͷೖࡳֹ ʢԁɿࢧֹʣ ࣮ࡍͷ$1. ʢԁʣ ଛࣦ ೖࡳֹ༧ଌʹΑͬͯܭࢉ͍ͯ͠ΔͷͰɺೖࡳ࣌ʹ ༧ଌͨ͠F$1.ΑΓ࣮ࡍͷ$1.͕͔ͬͨ߹
ଛࣦͱͳΔՄೳੑ͕͋Δɻ ߴ͗͢Δ༧ଌ$1. ˠଛࣦͷϦεΫ͕͋Δ͕ɺϚʔδϯΛ༧ଌޡࠩҎ্ʹઃఆ͢Δ͜ͱ ͰଛࣦͷϦεΫΛແ͘͢͜ͱ͕Ͱ͖Δɻ ͗͢Δ༧ଌ$1. ˠଛࣦͷϦεΫͳ͍͕ɺ࣮ࡍʹͬͱೖࡳֹΛߴ͘Ͱ͖ΔͷͰ ػձଛࣦͷՄೳੑ͋Γɻʢ༨Ϛʔδϯ͕ൃੜ͢Δʣ ೖࡳֹʢԁʣ
༨Ϛʔδϯ্ͤೖࡳ w 41"༧ଌޡࠩʹΑͬͯऔΓ͗ͨ͢ϚʔδϯΛೖࡳ$1.ʹ্ͤͯ͠ΦʔΫγϣϯͷউΛ্͛Δ w 1*%੍ޚͱ͍͏ख๏Λ༻͍ͯૈར͕ઃఆʹͳΔΑ͏ʹೖࡳ$1.Λܭࢉ ※ ޡࠩʹԠ͍͢͠Α͏ʹࢦؔΛ࠾༻
·ͱΊ
·ͱΊ w 'JSTU1SJDF"VDUJPOͷ߹ɺࣾͷೖࡳֹΛਖ਼֬ʹΔ͜ͱ͕Ͱ͖Εɺ ΦʔΫγϣϯউΛอͪͳ͕ΒૈརΛ࠷େԽͰ͖Δɻ w 4FDPOE1SJDF"VDUJPOͷ߹ɺϚʔδϯΛ༧ଌޡࠩΛߟྀ͠ͳΔ͘͘ ઃఆ͢Δ͜ͱͰΦʔΫγϣϯউͱૈརΛ࠷େԽͰ͖Δɻ w 4FDPOE1SJDF"JVDUJPO༧ଌޡࠩͳͲʹΑͬͯऔΓ͗ͨ͢Ϛʔδϯɺೖ ࡳֹʹ্ͤ͠ΦʔΫγϣϯউΛ্͛ͯ৴ྔΛ૿͢͜ͱͰࠂओʹؐ
ݩ͍ͯ͠Δɻ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠