Evaluation of Chinese Transport Infrastructure Investment Performance in Countries along the Belt and Road Initiative

Table 4

Return on scale analysis for countries in the high-performance area from 2011 to 2019.

Country in high-performance area	2011	2012	2013	2014	2015	2016	2017	2018	2019
Myanmar	−	−	−	+	+	+	+	+	+
Pakistan	+	+	+	+	+	−	−	+	−
Iran	+	+	−	−	+	+	+	−	−
Indonesia	+	+	+	+	+	−	+	−	−
Iraq	+	−	+	+	+	+	+	−	−
Saudi Arabia	+	+	−	−	−	+	+	−	+
Russia	+	+	+	+	−	+	+	+	+
Singapore	+	+	+	+	+	+	−	−	−

The symbol “+” means the return to scale is increasing and “−” means the return to scale is constant.