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Erratum
The Manchester School ( IF 0.7 ) Pub Date : 2021-04-29 , DOI: 10.1111/manc.12364


In the article by Hashizume and Nariu (2020), the following errors were published.

(On page 847) The Correspondence section should be Ryo Hashizume, Faculty of Art and Design (Correspondence Education), Kyoto University of the Arts: 2–116 Uryuyama, Kitashirakawa, Sakyo‐ku, Kyoto, Japan. Email: rhashizum@gmail.com.

(On page 850) Equations 1 and 2 should be
urn:x-wiley:14636786:media:manc12364:manc12364-math-0001(1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0002(2)
(On page 851) Equations 3, 4, 5, 6‐1, and 6‐2-3, 4, 5, 6‐1, and 6‐2 should be
urn:x-wiley:14636786:media:manc12364:manc12364-math-0003(3)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0004(4)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0005(5)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0006(6-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0007(6-2)
(On page 852) The maximization problem of firm i is expressed by
urn:x-wiley:14636786:media:manc12364:manc12364-math-0008
(On page 852) Equations 7, 8‐1, and 8‐2 should be
urn:x-wiley:14636786:media:manc12364:manc12364-math-0009(7)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0010(8-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0011(8-2)
(On page 853) Equations 9, 10‐1, 10‐2, 11‐1, 11‐2, 12‐1, 12‐2, 12‐3, and 12‐4-9, 10‐1, 10‐2, 11‐1, 11‐2, 12‐1, 12‐2, 12‐3, and 12‐4 should be
urn:x-wiley:14636786:media:manc12364:manc12364-math-0012(9)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0013(10-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0014(10-2)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0015(11-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0016(11-2)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0017(12-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0018(12-2)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0019(12-3)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0020(12-4)
(On page 854) Equations 13‐1, 13‐2, 13‐3, and 13‐4-13‐1, 13‐2, 13‐3, and 13‐4 should be
urn:x-wiley:14636786:media:manc12364:manc12364-math-0021(13-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0022(13-2)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0023(13-3)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0024(13-4)
(On page 857) Proposition 2 should be as follows:
urn:x-wiley:14636786:media:manc12364:manc12364-math-0025
where ∂f(e, n)/∂n < ∂f(e, n)/∂e ≦ 0.

Proof.From (8‐1)–(8‐2) and (10‐1)–(10‐2), it follows that πPP/πQQ = (1 − b2)(qPP)2/(qQQ)2. Let di = d, i = 1, 2, and then we have

urn:x-wiley:14636786:media:manc12364:manc12364-math-0026

Hence, we obtain the result: πPP/πQQ ⋛ 1 urn:x-wiley:14636786:media:manc12364:manc12364-math-00271 – b2 ⋛ [f(e, n)]2. By simple calculation, we get urn:x-wiley:14636786:media:manc12364:manc12364-math-0028

(On page 859) Equations 14‐1 and 14‐2-14‐1 and 14‐2 should be
urn:x-wiley:14636786:media:manc12364:manc12364-math-0029(14-1)
urn:x-wiley:14636786:media:manc12364:manc12364-math-0030(14-2)

(On page 862, 863) Under Section A2 | Proof of Lemma 1 should be

(i) From (8‐1), (10‐1), and (12‐1)–(12‐2), we get
urn:x-wiley:14636786:media:manc12364:manc12364-math-0031
(ii) From (8‐1) and (10‐1), it follows that
urn:x-wiley:14636786:media:manc12364:manc12364-math-0032
(iii) From (8‐1), (10‐1), and (12‐1), we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0033
(iv) From (8‐1), (10‐1), and (12‐1)–(12‐2), we get
urn:x-wiley:14636786:media:manc12364:manc12364-math-0034
which lead to urn:x-wiley:14636786:media:manc12364:manc12364-math-0035 by (A1)–(A3).

(On page 863, 864) Under Section A3 | Proof of Proposition 1 should be

(i) From (8‐1) and (10‐1), we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0036
where A(n) is defined in the proof of Lemma 1‐(ii). First, let us check the positivity of the coefficient of di. Multiplying the coefficient by (1 − n), we obtain
urn:x-wiley:14636786:media:manc12364:manc12364-math-0037
where the inequality follows from (1 − n)2 > (enb)2 by (A1) and (2 − n)(2 – nb2) − (1 − n)(3 – nb2) = 1 – b2 > 0. Hence, the coefficient of di is positive. Noting that A(n) ≧ 0 for any n ∈ [0, 1), urn:x-wiley:14636786:media:manc12364:manc12364-math-0038 holds if enb. Similarly, we have urn:x-wiley:14636786:media:manc12364:manc12364-math-0039 holds if enb.
Now, we consider the case where en > b. For the more efficient firm's price, we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0040
On the other hand, for price of the less efficient firm, we get
urn:x-wiley:14636786:media:manc12364:manc12364-math-0041

Therefore, we get the desired result.

(ii) Suppose that enb. From (8‐2) and (10‐2), it follows that urn:x-wiley:14636786:media:manc12364:manc12364-math-0042. Hence, we only need to show urn:x-wiley:14636786:media:manc12364:manc12364-math-0043. By (8‐1) and (10‐1), we get
urn:x-wiley:14636786:media:manc12364:manc12364-math-0044
where the inequality follows from (DQ/DP) ≧ [(2 − n)/(2 − nb2)]2 and [(2 − nb2)di + (enb)dj]/ [(2 − n)di + (enb)dj]> (2 – nb2)/(2 − n), by enb. Here, we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0045
where the inequality is due to nb. As a result, we obtain urn:x-wiley:14636786:media:manc12364:manc12364-math-0046.

(iii) From (ii), the statement is true if enb. Hence, it suffices to show that urn:x-wiley:14636786:media:manc12364:manc12364-math-0047 when en < b holds. From (8‐2) and (10‐2), we get

urn:x-wiley:14636786:media:manc12364:manc12364-math-0048

(On page 864) Under Section A4 | Proof of Corollary 1 should be

Let e = 0. From Proposition 2, we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0049

Hence, the necessary and sufficient condition for πPP > πQQ is given by urn:x-wiley:14636786:media:manc12364:manc12364-math-0050 < n. ■

(On pages 864, 865) Under Section A5 | Proof of Proposition 3 should be

From (12‐1)–(12‐4), it follows that
urn:x-wiley:14636786:media:manc12364:manc12364-math-0051
If en > b, we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0052
From (A3), (1 − n)dj> (ben)di holds, and we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0053
On the other hand, by applying a similar argument for the less efficient firm, we have
urn:x-wiley:14636786:media:manc12364:manc12364-math-0054

These have been corrected in the online version of the paper. We regret any inconvenience caused by these errors.



中文翻译:

勘误表

在Hashizume和Nariu(2020)的文章中,发布了以下错误。

(在第847页)通讯部分应为京都艺术大学艺术与设计学院(函授教育)桥久亮(Ryo Hashizume):日本京都左京区北岚河Uryuyama邮编2–116。电子邮件:rhashizum@gmail.com。

(在第850页)公式1和2应该是
缸:x-wiley:14636786:media:manc12364:manc12364-math-0001(1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0002(2)
(第851页)方程式3、4、5、6-1和62-3、4、5、6-1和6-2应为
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0003(3)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0004(4)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0005(5)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0006(6-1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0007(6-2)
(在第852页)公司i的最大化问题表示为
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0008
(第852页)公式7、8-1和8-2应为
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0009(7)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0010(8-1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0011(8-2)
(第853页)公式9、10-1、10-2、11-1、11-2、12-1、12-2、12-3和12-4-9、10-1、10-2 ,11-1、11-2、12-1、12-2、12-3和12-4应该是
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0012(9)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0013(10-1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0014(10-2)
缸:x-wiley:14636786:media:manc12364:manc12364-math-0015(11-1)
缸:x-wiley:14636786:media:manc12364:manc12364-math-0016(11-2)
缸:x-wiley:14636786:media:manc12364:manc12364-math-0017(12-1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0018(12-2)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0019(12-3)
缸:x-wiley:14636786:media:manc12364:manc12364-math-0020(12-4)
(在854页上)公式13-1、13-2、13-3和13-4-13-1、13-2、13-3和13-4应为
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0021(13-1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0022(13-2)
缸:x-wiley:14636786:media:manc12364:manc12364-math-0023(13-3)
缸:x-wiley:14636786:media:manc12364:manc12364-math-0024(13-4)
(在第857页)提议2应该如下:
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0025
其中∂FêÑ)/ ∂n < ∂FêÑ)/ ?E ≦0。

证明。从(8-1) - (8-2)和(10-1) - (10-2),它遵循π PP / π QQ =(1 -  b 2)(q PP2 /(q QQ2。令d i  =  di  = 1,2,然后有

骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0026

因此,我们得到的结果:π PP / π QQ ⋛1 骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-00271 - b 2 ⋛[ ˚FëÑ)] 2。通过简单的计算,我们得到骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0028

(在第859页)公式14-1和14-2-14-1和14-2应为
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0029(14-1)
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0030(14-2)

(在第862、863页上)在A2节中| 引理1的证明应为

(i)从(8-1),(10-1)和(12-1)–(12-2)中,我们得到
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0031
(ii)从(8-1)和(10-1)中得出
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0032
(iii)从(8-1),(10-1)和(12-1),我们有
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0033
(iv)从(8-1),(10-1)和(12-1)–(12-2)中,我们得到
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0034
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0035由(A1)–(A3)导致。

(第863、864页)在A3节中| 命题1的证明应为

(i)从(8-1)和(10-1),我们有
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0036
其中引理1-(ii)的证明中定义了An)。首先,让我们检查d i系数的正性。将系数乘以(1-  n),我们得到
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0037
其中不等式由(1-  n2  >(en - b2乘以(A1)和(2-  n)(2 – nb 2)−(1 −  n)(3 – nb 2) = 1 – b 2  >0。因此,d i的系数为正。注意到Ñ)≧0对于任何Ñ ∈[0,1),骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0038保持如果E Ñb。同样,我们骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0039认为如果E ñb
现在,我们考虑en  >  b的情况。对于更有效的公司价格,我们有
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0040
另一方面,对于效率较低的公司的价格,我们得到
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0041

因此,我们得到了预期的结果。

(ⅱ)假设b。从(8-2)和(10-2),得出骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0042。因此,我们只需要显示骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0043。通过(8-1)和(10-1),我们得到
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0044
其中不等式源自(D Q / D P)≥[(2-  n)/(2-  nb 2)] 2和[(2-  nb 2d i +(enbd j ] / [(2 -  ñð+(- bd Ĵ ]>(2 - ñ - b 2)/(2 -  ñ),通过连接b。在这里,我们有
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0045
其中不等式是由于Ñb。结果,我们得到骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0046

(iii)由(II),该声明是真实的,如果连接b。因此,足以证明骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0047en <b成立时。从(8‐2)和(10‐2),我们得到

骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0048

(在第864页)在A4节下|保留所有权利。推论1的证明应为

e  =0。根据命题2,我们得到
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0049

因此,对于必要和充分条件π PP  >  π QQ由下式给出骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0050< Ñ。■

(在第864、865页上)在A5节下| 命题3的证明应为

从(12-1)–(12‐4),得出
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0051
如果en  >  b,我们有
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0052
从(A3),(1 −  nd j >(bend i成立,我们有
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0053
另一方面,通过对效率较低的公司应用类似的论点,我们可以
骨灰盒:x-wiley:14636786:media:manc12364:manc12364-math-0054

这些已在论文的在线版本中得到纠正。对于这些错误给您带来的不便,我们深表歉意。

更新日期:2021-04-29
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