[CODE]* Example generated by -dataex-. To install: ssc install dataexclearinput long province byte year float(hrs ltvfo) 3 70   0 7.0323 71   0 7.3621 72   0 7.44 9 73   0 8.7822 74   0 8.0519 75   0 7.32 3 76   0 7.1124 77   0 7.3219 78   0 7.3814 79   0  7.416 80   . 8.2411 81 .16 7.8815 82 .31 8.3914 83 .99 7.52 2 84 .75 8.52 5 85   1 7.46 6 86   1 7.4327 87   1 7.61endlabel values province provincelabel def province 2 "beijing", modifylabel def province 3 "fujian", modifylabel def province 5 "guangdong", modifylabel def province 6 "guangxi", modifylabel def province 9 "heilongjiang", modifylabel def province 11 "hubei", modifylabel def province 14 "jiangxi", modifylabel def province 15 "jilin", modifylabel def province 16 "liaoning", modifylabel def province 19 "qinghai", modifylabel def province 21 "shangdong", modifylabel def province 22 "shanghai", modifylabel def province 23 "shanxi", modifylabel def province 24 "sichuan", modifylabel def province 27 "yunnan", modify[/CODE]
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Listed 18 out of 18 observations
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. do "C:\Users\Action\AppData\Local\Temp\STD2548_000000.tmp"
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. twoway (scatter  ltvfo hrs if year==81,mlabel(province)) (lfit ltvfo hrs if year=
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> =81  ) , ///
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>         title("图1 家庭联产承包责任制推行与种植业产值(1981年)", size(medlarge))  
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> ///
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>     ytitle("种植业产值对数") xtitle("年底采用家庭联产承包制的生产队比重")  ///
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>     note("PJY制图，数据来源: 中国统计年鉴") legend(off)
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(note:  regress could not fit model)
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insufficient observations