Gary Hansen is a securities analyst for a mutual fund specializing in small-capitalization growth stocks. The fund regularly invests in initial public offerings (IPOs). If the fund subscribes to an offer, it is allocated shares at the offer price. Hansen notes that IPOs frequently are underpriced, and the price rises when open market trading begins. The initial return for an IPO is calculated as the change in price on the first day of trading divided by the offer price. Hansen is developing a regression model to predict the initial return for IPOs. Based on past research, he selects the following independent variables to predict IPO initial returns:

Underwriter rank	= 110, where 10 is highest rank
Pre-offer price adjustmenta	= (Offer price Initial filing price)/Initial filing price
Offer size ($ millions)	= Shares sold Offer price
Fraction retaineda	= Fraction of total company shares retained by insiders

aExpressed as a decimal.

Hansen collects a sample of 1,725 recent IPOs for his regression model. Regression results appear in Exhibit 1, and ANOVA results appear in Exhibit 2.

Hansen wants to use the regression results to predict the initial return for an upcoming IPO. The upcoming IPO has the following characteristics:

underwriter rank = 6;

pre-offer price adjustment = 0.04; offer size = $40 million;

fraction retained = 0.70.

Exhibit 1 Hansens Regression Results Dependent Variable: IPO Initial Return (Expressed in Decimal Form, i.e., 1% = 0.01)

Variable	Coefficient (bj)	Standard Error	t-Statistic
Intercept	0.0477	0.0019	25.11
Underwriter rank	0.0150	0.0049	3.06
Pre-offer price adjustment	0.4350	0.0202	21.53
Offer size	0.0009	0.0011	0.82
Fraction retained	0.0500	0.0260	1.92

Exhibit 2 Selected ANOVA Results for Hansens Regression

	Degrees of Freedom (df)	Sum of Squares (SS)
Regression	4	51.433
Residual	1,720	91.436
	Total	1,724	142.869
		Multiple R-squared = 0.36

Because he notes that the pre-offer price adjustment appears to have an

important effect on initial return, Hansen wants to construct a 95 percent

confidence interval for the coefficient on this variable. He also believes

that for each 1 percent increase in pre-offer price adjustment, the initial

return will increase by less than 0.5 percent, holding other variables

constant. Hansen wishes to test this hypothesis at the 0.05 level of

significance.

Before applying his model, Hansen asks a colleague, Phil Chang, to

review its specification and results. After examining the model, Chang

concludes that the model suffers from two problems: 1) conditional

heteroskedasticity, and 2) omitted variable bias. Chang makes the

following statements:

Statement 1 Conditional heteroskedasticity will result in consistent

coefficient estimates, but both the t-statistics and F-statistic will be biased,

resulting in false inferences.

Statement 2 If an omitted variable is correlated with variables already

included in the model, coefficient estimates will be biased and inconsistent

and standard errors will also be inconsistent.

Is Changs statement 1 correct?