Botsford, J.
Under the Massachusetts corporate excise tax statute, G. L. c. 63, corporations that generate business income in
Massachusetts and other States pay taxes on that income according to a statutory formula that seeks to apportion and tax the corporation’s income generated in the Commonwealth. Beginning in 1996, for a “manufacturing corporation,” the apportionment formula has been based solely on the corporation’s sales, see G. L. c. 63, § 38 (l), inserted by St. 1995, c. 280, § 2. The taxpayer Genentech, Inc., is a Delaware corporation with a principal place of business in California and earns business income in the Commonwealth as well as other States. In this appeal from a decision of the Appellate Tax Board (board), Genentech challenges the board’s determination that it qualified as a manufacturing corporation for the tax years 1998 through 2004 (tax years at issue); it also challenges the board’s rejection of its claim that application of § 38 (/)’ s single-factor apportionment formula based on sales to the company violated the commerce clause of the United States Constitution. We affirm the decision of the board.
Facts.
We summarize the findings of fact made by the board. See G. L. c. 58A, § 13 (“The decision of the board shall be final as to findings of fact”). Genentech is a biotechnology company that develops drugs derived from proteins produced by living cells. Through a four-step process, Genentech employees modify the genetic codes of living cells to produce “proteins of interest” with desired pharmacologic effects.
First, Genentech scientists and other employees alter the deoxyribonucleic acid (DNA) of the selected cells to instruct them to produce a specific “protein of interest.” Second, employees facilitate the production of the protein of interest by placing the genetically altered cells in successively larger tanks to enable growth and feeding them glucose and other nutrients while closely monitoring their environment. Third, the protein of interest is purified by separating it from the mix of cells and other material present through ultrafiltration and chromatography; Genentech must extract the protein from some cells by “disrupting” or breaking down the cell walls containing them. Finally, following the purification process, Genentech employees formulate the resulting bulk drug into its final dosage form, and package it for sale to distributors or directly to physicians, hospitals, and pharmacies around the world.
On the financial side of Genentech’s operations, the company invests excess cash in short-term securities — money market
funds, commercial paper, and treasury bonds. From two to seven employees working in Genentech’s treasury department conduct a daily assessment of Genentech’s cash needs and then liquidate short-term investments to free up cash or invest excess cash in short-term securities, as necessary. Money market funds are pooled investment vehicles that aim to maintain a consistent net asset value of one dollar per share. Consequently, investors generally expect to be able to redeem their shares for the amount originally invested, while also earning interest or dividends through the term in which they hold shares in the money market fund. During the tax years at issue, the money market funds held in Genentech’s accounts maintained a one dollar net asset value, thus allowing Genentech to redeem them for the purchase price.
Genentech’s receipts pertaining to the transactions involving the short-term assets held in a number of Genentech’s separate accounts in Mellon Bank established that there were no capital gains or losses generated during the tax years at issue;
Genentech thus was able to either redeem the securities in every instance for the same amount as it paid for them, or hold the securities to maturity. Genentech did not include the proceeds it received from the redemption of its short-term securities in the statement of its revenue for purposes of the company’s financial statements, in the computation of gross receipts reported on its Federal corporate income tax return that was used to determine its taxable income, or in the total of its receipts used to compute sales factor apportionment in filling out the company’s California excise tax returns.
Procedural history.
For the tax years 1998 through 2003, Genentech filed its Massachusetts corporate excise returns using the three-factor apportionment formula based on property, payroll, and sales that applies to most general business corporations. See G. L. c. 63, § 38 (c).
For the 2004 tax year, Genentech
originally filed its Massachusetts corporate excise tax return using the single-factor apportionment formula applicable to manufacturing corporations, but later filed an application for abatement, claiming that it was not substantially engaged in manufacturing and thus should have been entitled to apportion its income on the standard three-factor basis.
The Commissioner of Revenue (commissioner) issued four notices of assessment to Genentech, taking the position that Gen-entech was engaged in substantial manufacturing activity for all the tax years at issue and thus required to use the single-factor apportionment formula in § 38 (l). Genentech filed several applications for abatement, all of which the commissioner denied. Genentech timely filed petitions under formal procedure with the board for each denial. The board ruled that Genentech was engaged in manufacturing for purposes of § 38 (l), that its manufacturing activities were “substantial ],” as required by § 38 (l), and that application of the single-factor apportionment formula to the company did not violate the commerce clause. Genentech filed a timely appeal, and we transferred the case from the Appeals Court to this court on our own motion.
Standard of review.
“A decision by the board will not be modified or reversed if the decision ‘is based on both substantial evidence and a correct application of the law.’ ”
Capital One Bank
v.
Commissioner of Revenue,
453 Mass. 1, 8, cert. denied, 557 U.S. 919 (2009), quoting
Boston Professional Hockey Ass’n
v.
Commissioner of Revenue,
443 Mass. 276, 285 (2005). “Because the board is authorized to interpret and administer the tax statutes, its decisions are entitled to deference. . . . Ultimately, however, the interpretation of a statute is a matter for the courts” (citation omitted).
Onex Communications Corp.
v.
Commissioner of Revenue,
457 Mass. 419, 424 (2010).
Discussion.
1.
Genentech’s manufacturing.
During the tax years at issue, a “manufacturing corporation” was defined in § 38 (/) (1) in relevant part as follows:
“In order to be engaged in manufacturing, the corporation must be engaged, in substantial part, in transforming raw or
finished physical materials by hand or machinery, and through human skill and knowledge, into a new product possessing a new name, nature and adapted to a new use.”
This court has considered whether particular activities conducted by a corporation qualify as ‘“manufacturing” in a number of different factual contexts.
We start with the premise that a critical component of manufacturing is ‘“the implication of change wrought through the applicahon of forces directed by the human mind, which results in the transformation of some preexisting substance or element into something different, with a new name, nature or use.”
Boston & Me. R.R.
v.
Billerica,
262 Mass. 439, 444-445 (1928). See
William F. Sullivan & Co.
v.
Commissioner of Revenue,
413 Mass. 576, 579 (1992) (“our decisions have embraced the basic concept of manufacturing articulated in
Boston & Me. R.R [supra]”); The Charles River Breeding Labs., Inc.
v.
State Tax Comm ’n,
374 Mass. 333, 335 (1978) (“Manufacturing normally involves a change of some substance, element, or material into something new or different”).
In cases where this court has determined that a company’s achvihes did not qualify as manufacturing, we have noted the absence of new products “of substantially different character” (citation omitted).
Tilcon-Warren Quarries, Inc.
v.
Commissioner of Revenue,
392 Mass. 670, 673 (1984). In that case, for example, we concluded that extrachng rocks from the ground and crushing them into smaller, commercially usable sizes did not involve a change in the material’s character necessary to qualify as manufacturing. See
id.
at 672-673. Similarly, the breeding and raising of partially uncontaminated laboratory animals was determined
not to be manufacturing because “‘[manufacturing normally involves a change of some substance, element, or material into something new or different [and] [n]o matter how intricately it is carried on, the production of partially uncontaminated animals by [the taxpayer] does not fit within this definition” (citation omitted).
The Charles River Breeding Labs., Inc.,
374 Mass. at 335.
On the other hand, we have found that a multitude of activities fall under the definition of manufacturing. We have held, for example, that a publisher’s ‘“compilation of information, photographs, and text, into proofs, edited, refined, and ultimately transferred to disk or CD ROM” is manufacturing because ‘“[t]he disks and CD ROMs possess a new nature and are adapted for a new use, namely the printing and binding of books.”
Commissioner of Revenue
v.
Houghton Mifflin Co.,
423 Mass. 42, 50-51 (1996). Similarly, the transformation of raw green coffee beans into marketable coffee through roasting, grinding, packaging, and selling is manufacturing, given that ‘“a raw material which was unfit for human consumption or any other practical use” was converted into ‘“a finished product which differed substantially from the raw material in appearance, form and taste, and which was thereby made adaptable to a use for which it otherwise would not be available.”
Assessors of Boston
v.
Commissioner of Corps. & Taxation,
323 Mass. 730, 741 (1949).
As in the cases just cited, we conclude that Genentech engages in manufacturing for purposes of § 38. Genentech argues its activities are comparable to mining. Unlike the extraction and crushing of rocks in the
Tilcon-Warren Quarries
case, however, Genentech is not merely paring something down to a smaller size. See 392 Mass. at 673. Nor do the cells that Genentech develops remain significantly unchanged. Rather, Genentech scientists and other employees, by hand or machine, implant DNA molecules into a cell to genetically transform the medium to behave in ways other than what its natural genetic code would dictate. Although the cells may replicate thereafter on their own, each genetically modified and replicated cell is different from the original cell in a most fundamental way. Moreover, the modified cell itself is far from the final product: it is the ‘“protein of interest” that Genentech extracts from each of the modified cells and then purifies that serves as the source of each drug that Genentech then markets and sells.
‘“The words ‘engaged in manufacturing’ are not to be given a narrow or restrictive meaning.”
Assessors of Boston,
323 Mass. at
748-749. We agree with the board that where such a clear transformation has occurred, Genentech’s drug production activities qualify as manufacturing within the meaning of § 38 (/).
2.
Substantial manufacturing and gross receipts.
Under § 38 (/) (1), a corporation engaged in manufacturing only qualifies as a “manufacturing corporation” subject to the single-factor apportionment formula based on sales in § 38 (/) (2) if it engages “in substantial part” in manufacturing activities. Genentech claims that even if it is engaged in manufacturing, it still does not qualify as a manufacturing corporation because it does not satisfy the necessary test for engaging in “substantial” manufacturing. The board rejected Genentech’s argument, as do we.
Section 38 (l) (1) sets out five alternative tests for measuring whether a corporation’s manufacturing work is “substantial,” and provides that only one of these tests must be met.
The parties agree that the first alternative test is the most apt to Genentech; the first alternative test requires proof that twenty-five per cent or more of the corporation’s “gross receipts are derived from the sale of manufactured goods that it manufactures.”
Id.
The term “gross receipts” in this first alternative is not defined in § 38 (l). Generally, “where [a] statutory term is not defined, ‘it must be understood in accordance with its generally accepted plain meaning.’ ”
Ten Local Citizens Group
v.
New England Wind, LLC,
457 Mass. 222, 229 (2010), quoting
Allen
v.
Boston Redevelopment Auth.,
450 Mass. 242, 256 (2007). Genentech
argues that the commonly understood meaning of “gross receipts” is clear (and expansive): the term means the
total
amount of receipts received, without deduction for expenses or other items. Genentech also urges us to read § 38 (/) in harmony with § 38 (/), which sets out the governing definition of “sales factor” used in all the § 38 allocation formulas, whether three-factor or single-factor. As in effect during the tax years at issue, § 38
if),
inserted by St. 1966, c. 698, § 58, provided in relevant part:
“The sales factor is a fraction, the numerator of which is the total sales of the corporation in this commonwealth during the taxable year, and the denominator of which is the total sales of the corporation everywhere during the taxable year.
As used in this subsection, ‘sales’ means all gross receipts of the corporation except interest, dividends, and gross receipts from the maturity, redemption, sale, exchange or other disposition of securities”
(emphasis added).
Pointing to generally applicable rules of statutory construction, Genentech argues that because “gross receipts” is defined in § 38 (/) with a specific exception for receipts from the redemption or other disposition of securities, whereas no such exception is included in § 38 (/), “gross receipts” in § 38 (/) must be interpreted to include receipts of all transactions involving securities, including redemption and return at maturity. See, e.g.,
Simmons
v.
Clerk-Magistrate of the Boston Div. of the Hous. Court Dep’t,
448 Mass. 57, 65 (2006) (“[W |here the Legislature has employed specific language in one portion of a statute, but not in another, the language will not be implied where it is absent”).
The board did not adopt the analysis Genentech advances here. The board noted the volume of transactions whereby Genentech redeemed and reinvested cash on an almost daily basis, and pointed out that if Genentech’s “gross receipts” were defined to include the receipts from the redemption or return at maturity of funds invested in short-term securities, the percentage of the company’s “receipts” related to sales involving its drugs and other income-generating transactions was dramatically different, and dramatically lower, than if receipts from what in substance is a return of capital were omitted.
Using the 2004 tax year as an
example, the board pointed out that if Genentech’s interpretation were accepted,
“[Genentech] would have generated $39,226,839,298 in gross receipts, of which only $4,578,096,817 came from ordinary business income, such as revenue from the sale of drugs, royalties from the license of intellectual property, contract revenue, and investment income in the form of interest, dividends, and capital gains. The remainder of those ‘gross receipts’ would have been derived from redeeming money market funds or commercial paper for their cash equivalent, receipts that were not included for accounting purposes in the measures of revenue reported to shareholders or included in the computation of taxable income. Using these figures as a proxy would mean that approximately 88% of Genentech’s overall business activities in 2004 consisted of a handful of employees in the treasury department managing Genentech’s day-to-day cash flow.”
We agree with the board that such a result is “distortive” of Genentech’s operations, transforming, for Massachusetts corporate income tax purposes, this self-described biotechnology company with substantial revenue derived from sales of its specialty drugs into essentially an investment business.
Under § 38 (/) (1), gross receipts are considered for purposes of determining whether a company’s manufacturing activities are a substantial enough portion of its business to qualify it as a “manufacturing corporation” under the corporate excise tax statute. Interpreting the absence of a specific exception in § 38 (/) (1) for receipts from redemption or return at maturity of securities to mean that the return of all Genentech’s capital invested in short-
term securities is to be included as part of its gross business receipts runs counter to the reality of Genentech’s business and essentially makes no sense. We do not consider the meaning of “gross receipts,” as used in § 38
if),
to be plain and unambiguous,
but even if it were, this court will not interpret a statute according to the plain meaning of its words where to do so would lead to absurd or unreasonable results. See, e.g.,
Bridgewater State Univ. Found.
v.
Assessors of Bridgewater,
463 Mass. 154, 158 (2012), and cases cited.
The board concluded that the interpretation advanced by Genentech would have absurd consequences. We agree, and further accept and agree with the board’s interpretation of the term “gross receipts” in § 38 (/) (1) to be limited to receipts relating to business income received by Genentech, including, insofar as investment income is concerned, interest, dividends, and capital gains. Under this interpretation, as reflected in note 8,
supra,
it is clear that during all the tax years at issue, more than twenty-five per cent of Genentech’s gross receipts were “derived from the sale of manufactured goods that it manufactures.” G. L. c. 63, § 38 (l) (1). Accordingly, Gen-entech qualified in each of these tax years as a “manufacturing corporation” as defined in § 38 (l) (1), and under § 38 (l) (2), was required to apportion its income under the single-factor formula
using solely the statute’s sales factor.
3.
The commerce clause.
Genentech challenges the constitutionality of § 38 (/), arguing that as applied to it, the statute violates the dormant commerce clause of the United States Constitution. See Art. I, § 8, cl. 3, of the United States Constitution. The claim is that application of the statute’s single-factor apportionment formula to the company, in combination with the unavailability of what it refers to as the Commonwealth’s “manufacturing credits,”
creates a discriminatory and unfair tax burden that contravenes the commerce clause test set out in
Complete Auto Transit, Inc.
v.
Brady,
430 U.S. 274, 279 (1977). Genentech’s challenge fails.
a.
Background.
As stated previously, § 38 establishes allocation formulas for determining the amount of a business corporation’s net income that is subject to taxation in the Commonwealth. If a corporation’s income is subject to income tax only in Massachusetts, one hundred per cent of its net income is taxable here, see § 38 (/;), but if the income is taxable in one or more States in
addition to Massachusetts, the portion that is subject to tax here will be determined according to an allocation formula set out in one of the other subsections of § 38. Before § 38 (l) was added to G. L. c. 63 in 1995, the amount of income tax paid by a manufacturing corporation with taxable business income in several States was determined by use of the three-factor apportionment formula in § 38 (c).
See G. L. c. 63, § 38 (c), as amended through St. 1996, c. 264, § 2. The 1995 amendment to § 38 removed manufacturing corporations from the class of corporations subject to the § 38 (c) three-factor apportionment formula and established the single-factor formula based only on sales. See St. 1995, c. 280, § 2. The single-factor formula was implemented over four years, beginning in 1996; by the beginning of 2000, all manufacturing corporations with taxable income in both Massachusetts and another State were required to apportion their income using solely the sales factor. See
id.
The “manufacturing credits” to which Genentech refers were enacted long before § 38 (l) was added to the corporate excise tax statute. Thus, the investment tax credit (ITC), G. L. c. 63, § 31 A, was enacted in 1970, see St. 1970, c. 634, § 2;
and the research and development credit (R&D credit) described in G. L. 63, § 38M, was enacted in 1991, see St. 1991, c. 138, § 130.
b.
Section 38
(l). The United States Supreme Court “has long upheld, subject to certain restraints, the use of a formula-apportionment method to determine the percentage of a business’ income taxable in a given jurisdiction.”
Westinghouse Elec. Corp.
v.
Tuliy,
466 U.S. 388, 398 (1984). The Court also has “repeatedly held that a single-factor formula is presumptively valid.”
Moorman Mfg. Co.
v. Bair, 437 U.S. 267, 273 (1978). Genentech claims, however, that the single-factor apportionment formula in § 38 (/), as applied to it, rebuts this presumption of validity because it violates the commerce clause test established in the
Complete Auto Transit
case, 430 U.S. at 279, insofar as the formula is (1) discriminatory in relation to interstate commerce; (2) not fairly apportioned in relation to the extent of Genentech’s activities in Massachusetts; and (3) not “fairly related to the services provided by the State.”
Id.
Genentech’s complaint, however, centers virtually entirely on the first
Complete Auto Transit
test. In particular, Genentech complains that by requiring the company to use § 38 (/)’s single-factor apportionment formula based only on sales while simultaneously denying it the benefit of the ITC and R&D credit, § 38 (/) discriminates against the company as a foreign corporation whose manufacturing activities take place in a State other than Massachusetts (i.e., California), and therefore unconstitutionally burdens interstate commerce.
The dormant commerce clause “denies the States the power unjustifiably to discriminate against or burden the interstate flow of articles of commerce.”
Oregon Waste Sys., Inc.
v.
Department of Envtl. Quality of Or.,
511 U.S. 93, 98 (1994).
We disagree with Genentech’s claim, based on its reading of the legislative history of § 38 (l), that the statutory change in the excise tax
apportionment formula for manufacturers in 1995 was an intentionally discriminatory one, fueled by a purpose to benefit local manufacturers directly at the expense of manufacturers that maintain their manufacturing facilities and operations in other States. Rather, we read the legislative history of § 38 (/) as indicating that the purpose of the change in the apportionment formula was to encourage manufacturers to increase the level of their investment in manufacturing operations in the Commonwealth by removing a tax “disincentive” created by the three-factor formula.
,
The Supreme Court has recognized this type of business investment encouragement as a constitutionally appropriate goal. See
Trinova Corp.
v.
Michigan Dep’t of Treasury,
498 U.S. 358, 385-386 (1991), quoting
Boston Stock Exch.
v.
State Tax Comm ’n,
429 U.S. 318, 336 (1977) (“It is a laudatory goal in the design of a tax system to promote investment that will provide jobs and prosperity to the citizens of the taxing State. States are free to structure their tax systems to encourage the growth and development of interstate commerce and industry” [quotation omitted]).
It is true, as Genentech points out, that when the 1995 change in the apportionment formula for manufacturing corporations from one using an income allocation formula that includes Massachusetts property and payroll to one focusing solely on Massachusetts sales occurred, it may well have caused the amount of income apportioned to Massachusetts to decrease for manufacturing corporations that conducted their manufacturing operations in the Commonwealth, and have had the opposite effect on such
corporations, like Genentech, with their manufacturing facilities elsewhere.
But the dormant commerce clause does not forbid a State from changing the allocation formula it uses to determine what share of the income generated by a multistate corporation operating in the taxing State is fairly subject to tax. As previously stated (see note 17,
supra),
what the commerce clause forbids as discriminatory is a State tax measure that “tax[es] a transaction or incident more heavily when it crosses state lines than when it occurs entirely within the State.”
Chemical Waste Mgt., Inc.
v.
Hunt,
504 U.S. 334, 342 (1992), quoting
Armco Inc.
v.
Hardesty,
467 U.S. 638, 642, (1984). See
Boston Stock Exch.,
429 U.S. at 337 (State may not “discriminatorily tax the products manufactured or the business operations performed in any other State”);
id.
at 332 n.12 (State ‘“may not discriminate between transactions on the basis of some interstate element”). The single-factor apportionment formula prescribed by § 38 (/) does not commit any such sin. It uses the same apportionment formula to tax every multistate manufacturing corporation’s income generated from its sales in the Commonwealth, treating
every
corporation, whether foreign or domestic, exactly the same. More to the point, the formula treats the income from every sales transaction involving manufactured goods exactly the same, no matter where the corporation’s manufacturing operations may be located. Compare,
e.g.,
New Energy Co. of Ind.
v.
Limbach,
486 U.S. 269, 274 (1988) (Ohio fuel tax credit for Ohio-produced fuel unconstitutionally discriminates against products of out-of-State manufacturer in violation of commerce clause);
Bacchus Imports, Ltd.
v.
Dias,
468 U.S. 263, 271-272 (1984) (Hawaii tax exemption solely for liquor produced in Hawaii unconstitutionally discriminatory). The single-factor apportionment formula based on sales in § 38 (l), on its face or as applied to Genentech, does not discriminate against interstate commerce.
Nor does the unavailability of the ITC or the R&D credit to a manufacturing corporation like Genentech, that has chosen to conduct its manufacturing operations and perform research and development activities in a State other than Massachusetts, change this result. It is true that these credits, if available to a manufacturing corporation, are available to reduce the corporation’s excise tax burden. But the credits were in existence long before § 38 was amended in 1995 to add § 38 (/) for manufacturing corporations; are available to a variety of corporations in addition to manufacturing corporations; and are clearly designed to encourage companies to locate operations in Massachusetts and thereby invest in the economy of the State. The commissioner points out that many States have adopted similar investment tax and R&D tax credits, including California; the record indicates that Genentech has qualified for and used California’s equivalent credits against its California tax burden for many years.
The availability of these credits — which are tied to investments of resources in the Commonwealth, are available to any manufacturing corporation, foreign or domestic, and operate independently of the corporation’s interstate sales or other interstate commercial activities — does not violate the commerce clause. See
New Energy Co. of Ind.,
486 U.S. at 278 (“The Commerce Clause does not prohibit all state action designed to give its residents an advantage in the marketplace, but only action of that description
in connection with the State's regulation of interstate commerce.
Direct subsidization of domestic industry does not ordinarily run afoul of that prohibition; discriminatory taxation of out-of-state manufacturers does’’ [emphasis in original]). See also
Fireside
Nissan, Inc.
v
Fanning,
30 F.3d 206, 216 (1st Cir. 1994).
Decision of the Appellate Tax Board affirmed.