Table 4.

Robustness check using n-grams.

	Model 1	Model 2	Model 3	Mode 4	Model 5	Model 6
	Ln(PEB + 1)	Ln(PEB + 1)	Ln(PEB + 1)	PED	PED	PED
Retro		−0.200***	−0.165*		0.003***	0.007*
Imme		0.036***	0.024		0.134**	0.122***
Prosp		0.085***	0.120***		0.021***	0.027***
Richness			0.206***			0.145***
Retro* Richness			0.128***			−0.007*
Imme* Richness			−0.002			0.091***
Prosp* Richness			0.165***			0.412***
ln(Fans + 1)	0.431***	0.330***	0.231***	0.321***	0.034***	0.023***
Url	−0.006*	−0.009	−0.003	−0.002***	−0.000***	−0.001*
ln(Length + 1)	0.503***	0.564***	0.641***	0.301***	0.342***	0.239**
ln(views + 1)	0.154***	0.170***	0.201***	0.023***	0.012***	0.004***
R-squared	0.385	0.453	0.443	0.145	0.209	0.254

Note: * p < 0.05; ** p < 0.01; ***p < 0.001.