net opinion rule in New Jersey

2026The net opinion rule, a corollary of N.J.R.E. 703, "forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data." Townsend, 221 N.J. at 53 -54 (quoting Polzo v. County of Essex, 196 N.J. 569, 583 (2008)).

2026"The net opinion rule . . . mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Townsend, 221 N.J. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)); see also In re Civil Commitment of A.Y., 458 N.J.

2026The net opinion rule, a corollary of N.J.R.E. 703, "forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data." Townsend, 221 N.J. at 53 -54 (quoting Polzo v. County of Essex, 196 N.J. 569, 583 (2008)).

2026A. "The net opinion rule is a 'corollary of [N.J.R.E. 703] . . . which forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data.'" Townsend v. Pierre, 221 N.J. 36, 53-54 (2015) (alteration in original) (quoting Polzo v. Cnty. of Essex, 196 N.J. 569, 583 (2008)).

2026"The net opinion rule . . . mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Townsend, 221 N.J. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)); see also In re Civil Commitment of A.Y., 458 N.J.

2026"The net opinion rule, however, mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Id. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)).

2026"The corollary of that rule is the net opinion rule, which forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data." State v. Townsend, 186 N.J. 473, 494 (2006).

2026The Supreme court has explained that "the net opinion rule 'requires an expert to give the why and wherefore of his or her opinion, rather than a mere conclusion.'" State v. Townsend, 186 N.J. 473, 494 (2006); Rosenberg v. Tavorath, 352 N.J.

2017The net opinion rule, a corollary of N.J.R.E. 703, is more or less "a prohibition against speculative testimony." Grzanka v. Pfeifer, 301 N.J.

2013The net opinion rule is succinctly defined as "a prohibition against speculative testimony." Grzanka v. Pfeifer, 301 N.J.

2025N.J.R.E. 703 states that an expert's opinion must be based in facts or data "perceived by or made known to the expert . . . ." The net opinion rule is a "mere restatement of the established rule that an expert's bare conclusions, unsupported by factual evidence, is inadmissible." Buckelew v. Grossbard, 87 N.J. 512, 524 (1981).

2024Thus, the net opinion rule can be considered a "restatement of the established rule that an expert's bare conclusions, unsupported by factual evidence, [are] inadmissible." Buckelew [v. Grossbard, 87 N.J. 512, 524 (1981)].

2026"The net opinion rule, a corollary of N.J.R.E. 703, 'forbids the admission into A-2895-22 36 evidence of an expert's conclusions that are not supported by factual evidence or other data.'" Burney, 255 N.J. at 23 (quoting Townsend, 221 N.J. at 53-54 ); see also Pomerantz Paper Corp. v. New Cmty. Corp., 207 N.J. 344, 372 (2011).

2025"The net opinion rule, a corollary of N.J.R.E. 703, 'forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data.'" Burney, 255 N.J. at 23 (quoting Townsend v. Pierre, A-2475-22 14 221 N.J. 36, 53-54 (2015)); see also Pomerantz Paper Corp. v. New Cmty. Corp., 207 N.J. 344, 372 (2011).

2024In short, the net opinion rule is "a prohibition against speculative testimony." Harte v. Hand, 433 N.J.

2024Super. 119, 134 (App. Div. 2017) ("The net opinion rule is a 'prohibition against speculative A-0768-22 12 testimony.'" (quoting Harte v. Hand, 433 N.J.

2026"The net opinion rule is not a standard of perfection." Ibid.

2025"The net opinion rule . . . mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Id. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)).

2024In Davis v. Brickman Landscaping, Ltd., 219 N.J. 395 (2014), our Court elaborated on the parameters of the net opinion rule and the factors to be employed when applying it.

2024The net opinion rule "requir[es] that the expert 'give the why and wherefore' that supports the opinion, 'rather than a mere conclusion.'" Davis, 219 N.J. at 410 (alteration in original) (quoting Pomerantz Paper Corp., 207 N.J. at 372 ).

2026"The net opinion rule, however, mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Id. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)).

2026"The net opinion rule, however, mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Id. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)).

2025Our Supreme Court has recognized the net opinion rule "is not a standard of perfection," Townsend, 221 N.J. at 54 , and expert testimony should not be reduced to inadmissible net opinion "merely 'because it fails to account for some particular condition or fact,'" ibid. (quoting Creanga v. Jardal, 185 N.J. 345, 360 (2005)), or to give proper weight to a factor the adverse party thought important.

2021"The corollary of [Rule 703] is the net opinion rule, which forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data." Ibid. (quoting Townsend, 186 N.J. at 494 ) A-4070-18 19 (alteration in original); see Creanga v. Jardal, 185 N.J. 345, 360 (2005) ("[a]n expert's conclusion is considered to be a 'net opinion,' and thereby inadmissible, when it is a bare conclusion unsupported by factual evidence"). "[T]he net opinion rule 'requires an expert to give the why and wherefore of his or her opinion, rather than a mere conclusion.'" Town

2026In short, "[t]he net opinion rule is a 'prohibition against speculative testimony.'" Ehrlich v. Sorokin, A-2488-23 13 451 N.J.

2024"The net opinion rule is a 'prohibition against speculative testimony.'" Ehrlich v. Sorokin, 451 N.J.

2026"The net opinion rule . . . mandates that experts 'be able to identify the factual bases for their conclusions, explain their methodology, and demonstrate that both the factual bases and the methodology are reliable.'" Townsend, 221 N.J. at 55 (quoting Landrigan v. Celotex Corp., 127 N.J. 404, 417 (1992)); see also In re Civil Commitment of A.Y., 458 N.J.

2020However, the net opinion rule "does not require experts to organize or support their opinions in a specific manner 'that opposing counsel deems preferable.'" In re Civil Commitment of A.Y., 458 N.J.

2024The net opinion rule also "focuses upon 'the failure of the expert to explain a causal connection between the act or incident complained of and the injury or damage allegedly resulting therefrom.'" Kaplan v. Skoloff & Wolfe, P.C., 339 N.J.

2018"The net opinion rule is a 'corollary of [N.J.R.E. 703] . . . which forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data.'" Townsend, 221 N.J. at 53 - 54 (alteration in original) (quoting Polzo v. Cty. of Essex, 196 N.J. 569, 583 (2008); see also Kaplan v. Skoloff & Wolfe, P.C., 339 N.J.

2026Pursuant to N.J.R.E. 703, an expert opinion must be based on facts or data derived from (1) the expert's personal observations, or (2) evidence admitted at the trial, or (3) data relied upon by the expert which is not necessarily admissible in evidence but which is the type of data normally relied upon by experts in forming opinions on the same subject. [Townsend, 221 N.J. at 53 (quoting State v. Townsend, 186 N.J. 473, 494 (2006)).] N.J.R.E. 703's corollary, the net opinion rule, "stands for the proposition that an expert opinion must have a rational basis" and prohibits admitting an expert's

2025"In essence, the net opinion rule requires the expert witness to give the why and wherefore of his expert opinion, not just a mere conclusion." Ibid.

2025An expert's opinion may be deemed a net opinion when the expert "does not demonstrate the soundness of a methodology, both in terms A-0867-23 9 of its approach to reasoning and to its use of data . . . ." In re Accutane Litig., 234 N.J. 340, 400 (2018).

2022An expert's opinion may be deemed a net opinion when the expert "does not demonstrate the soundness of a methodology, both in terms of its approach to reasoning and to its use of data . . . ." In re Accutane Litig., 234 N.J. 340, 400 (2018).

2019Like the experienced trial judge, whose decision is entitled to appellate deference absent an abuse of discretion, Hisenaj v. Kuehner , 194 N.J. 6 , 16, 942 A.2d 769 (2008), *258 we are satisfied that the expert testimony offered in these four cases did not run afoul of the net opinion standard.

2019Like the experienced trial judge, whose decision is entitled to appellate deference absent an abuse of discretion, Hisenaj v. Kuehner , 194 N.J. 6 , 16, 942 A.2d 769 (2008), *258 we are satisfied that the expert testimony offered in these four cases did not run afoul of the net opinion standard.

2019Co., 240 N.J.

2007Co., 240 N.J.Super. 289, 300 , 573 A. 2d 196 (App.Div.), certif. denied, 122 N.J. 333 , 585 A. 2d 349 (1990).

2020See Quail v. Shop-Rite Supermarkets, Inc., 455 N.J.

2019The net opinion doctrine is a "corollary of [N.J.R.E. 703] . . . which forbids the admission into evidence of an expert's conclusions that are not supported by factual evidence or other data." Quail v. Shop-Rite Supermarkets, A-1248-17T3 14 Inc., 455 N.J.

2024It is generally recognized that in the ordinary medical malpractice case[,] "the standard of practice to which [the defendant-practitioner] failed to adhere must be established by expert testimony," . . . [because] a jury generally lacks the "requisite special knowledge, technical training and background to be able to determine the applicable standard of care without the assistance of an expert." A-3878-22 20 [Rosenberg v. Cahill, 99 N.J. 318, 325 (1985) (second alteration in original) (quoting Sanzari v. Rosenfeld, 34 N.J. 128, 134-35 (1961)).] "The net opinion rule is a 'corollary of [N.J.R.

2024See State v. Chirokovskcic, 373 N.J.